The complete Idea is not complete bad but could make better.
Sorry, there are so many pages and maybe I tell something double, but I also have an opinion and that I want say.
The first message about from LL was sound interesting "bad experience of residents" and so on. But what kind of experience that could be?
I also not like seeing each time & everywhere adult content, maybe it have to be get a little "sorting". But the way, it's planned is BAD.
BEFORE less residents was telling something about "bad experiences" - AFTER will be upset a lot residets about censoring, blocking the freedom and more.
But what can we make, to make it better experience for us all?
There are SOME points:
First, I'm fine with adding a third way of flag content and land. "PG", "mature", Adult" (even the complete main-grind IS an adult-system).
But I don't like censoring. We are adults here and we are not here to teach childrens - the parents should take care about them. And if "little Billy" lie about his age, he will also 'borrow' the identity from his parents or someone else. So the Age Verification is a fake each way.
The Search:
The actual search HAVE the option, to block MATURE stuff.
It would be great, to have the choice between the 3 flags. Maybe I NOT want see the PG-stuff sometimes?
Make 3 check-boxes - PG, Mature, Adult.
The user can check/uncheck them unique and search special that, what he/she looking for (also "PG+mature, but not adult", "mature+adult", "PG,mature,adult" and also ridiculous combinations like "Adult+PG, but not mature"

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The way to must see PG-content each time is also not really pleasent. So: Fair for all, make also for PG-content in the search the option to switch off.
Blocking not age verified people is a failure. Let it free and open, let all see all content.
Not age verified people should still have access to adult-content, but maybe the search-window could give a warning or a fat writing on top like "ADULT" or so.
What's the benefit?
- Users can search much better, for what they looking for (also "no PG!"

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- No lost of business for people, which have for some reason content in an adult area.
Blocking Content/Access:
"A world, free to explore" and so on - or something like this LindenLab advertises SL.
For new users it would be a much more worse experience, if they cannot "free go everywhere". "Second Life? Boring, better name it 'Censored Life'!"
I hate ban-lines. And here we not talking about a parcel, someone cannot access - this will be a whole continent! Also if people not can see, what there is, why should they come there?
LindenLab is much proud about the business between the users and the transaction rate. What will be, if sellers of content need to think, if they go, where the people with money are (Adult-Land) with the risk, a lot residents will not find or cannot access them ... or a mature area, where maybe someone become upsed because the model have not covered their 'eyes', because it's a very tiny dress?
Let still all people access all areas, as long the parcel owner not have set "Adult Only" by his/hers choice, even it's on Adult-Land.
On the Adult-Continent also the ban-lines could go unlimited high to protect the parcel. We are there for some reasons and not to fly trough the air.
Not age verified people should get a warning, maybe before the teleport or at least after the arrive.
Also the Sim should remind ALL not age verified trough an onscreen-message (without the option to switch off) all 10 or 20 minutes, maybe also with a sound-output like a friendly Torley-voice "Hello, you are in an ADULT area." or so.
What's the benefit?
- People can stay in privacy and protect their personal data and still have the freedom to walk around.
- Users can check out, what is on this 'mysterious Adult-Land'.
- Shop-Ownern not loose their business.
- People are still warned, that they are on a 'bad' place.
Moveing Content:
The way of forceing is definitly wrong. We talking here not about a guy, which have open a NightClub in a PG-Resitental-Sim - here are CUSTOMERS which have PAY for LONG TIMES LindenLab's bills and follow the rules and now they have to go! A very good experience with the customer-care, Linden Lab! I have some words for in my mind for that: Betray, Ingorance, Intollerance, Fraud and breaking contracts (that is in my mind, judgeing about is an other point).
Some of the places are there for years. Your customers have invest shiploads of money to advertise the places, bring the landmarks to resitends, fill the pictures in the profiles, also pay much overdone prices to expand clubs and so ... and now? "We play business-crises also in SL - it is now all worthless!"
Ok, it is a bad experience, if you buy a parcel somewhere and just a week later on the neighbor-parcel open a adult place - Lag, people which not know parcel borders and so on. If in the furture the 'bad' places open new in the Adult-continent, all are fine. But what IS now there, let STAY it there.
A "Adult-Continent" is not bad, but the content can move (or not) in 3 possible ways:
* Complete Sim's could easy relocate, no changes for the landmarks and all needed, fine. Surely is the mainland not complete flat, but then the Moles have again something to do. Maybe also same right for all, like "if 75% of a Sim is adult, it can move - even the other 25% mature/PG-stuff also moves to adult land".
* Parcels on mature land which are now there, could stay as long the owner not changes. Big investments for the places are not lost. Some rules are ok, like "not on the landingpoint as greeting an axe on the head" or "not stepping in a couple of people" and explicit things need to be hidden in a skybox or so and not in 20m-chatrange of neighbors.
* Parcel-Owner which would like to move to the Adult-continent could get a teasing like "1 month for free, if the adult stuff moves".
On private islands should the combination of mature and Adult stuff be possible - there are so many patchwork-islands.
Benefit?
-SL changes fast, the most of the lasting parcels will be gone in a long-term plan.
-Invests for places are not lost.
-Paying customers will not leave SL because they are forced to move and maybe will thrust LindenLab in a future time again.
Age Verification:
Accepting a verified payment methode as verify is a good point.
Let us be honest: Childs will become age verified, maybe also much more easy then realy mature people. "Why to have take care about peronal data? That are not mine."
The way acceppting creditcards (or paypal) are fair enough and same secure like personal data, which Aristole or so maybe can verify for some countrys but most fail for example for europe.
Handle Alt (alternate Accounts):
Why these secrets? Behind the scenes are Alt's binded together - try and make your Alt "visible in Search", but you will not find it in the new Search.
It would be great, to see in the web-page, which alt's are binded together (there are also failures). An option to open new alt-accounts from the page would be an additional benefit.
Benefit?
- Only for LindenLab, because if now all start verifying also their alt's, the 3rd-party companys like creditcard-prozessors and special Aristole will bill each verifying to Linden Lab.
All in all?
- Seperated choose for PG,Mature,Adult-Stuff in the search.
- Let the freedom that all residents can access all content, but not age verified people could reminded on adult-parcels all 10,20 minutes - no loss for shoppeing business.
- Moveing Adult-stuff to an adult-continent only with the residents, not by force. Complete Sim's can relocate, existing places could stay.
- Age Verification like planed, additional with CreditCard.
- Make alt-accounts to handle and see which are binded to the account on the web-page (not inworld). Verify Alt's with the main-account.