group roles system redux, for Kelly Linden

In reply to posts at : my previous post on this topic...

I would like to set up my parcel so that unless someone is in the land-owning group and has various group-given permissions;
1) they cannot clutter the parcel with objects, or bash people around with physical objects.
2) they cannot use scripted weapons, such as guns, or rez scripted objects that blow people away or scriptbomb the sim.

1) seems impossible because they can just rez objects outside the parcel and move them in. Then do what they want with these objects. Ok, those objects might not be scripted if I set no-script too, but they're still very abusable by rezzing huge amounts of physical objects, for example.
2) seems impossible because if I enable no script, nobody but the land owning group can own scripted objects in the parcel, which isn't practical for things like vendors which have to accept/give money, give items or instant message people. Nor does it protect against people just whipping out guns and blowing other avs away, or using scripts which lag the sim so badly everyone leaves.

I'd like to set up a parcel so that only people who are in my invite-only group have the permissions needed to do anything disruptive on the parcel like shoot weapons or rez objects that run disruptive scripts.

How much will I be able to do that in 1.12?

It seems like I won't be able to, because I can't set my land no script because if I did I would have to force all objects on my parcel to be deeded to group, which would stop things like vendors etc from working, but would not stop people shooting off guns. I could set it no build, but that is pointless as people can just rez objects on another parcel and move them in, or use bullet-less guns. So, what can I do?

I realise that the no-push flag is coming (is that planned for inclusion in any specific version of SL, like 1.11, or 1.12, or 1.13?)... but that won't stop people doing things like rezzing a bunch of nukes which lag the sim so badly it becomes unusable for everyone.

I'm after a solution that lets the public on my parcel, but with no build/script permissions at all, but which lets members in a group role have build/script permissions free of restriction. What's the closest I can get to that?