Youre flying along, or cruising your boat, and the next thing you know youre avatar is drifting throught the ground. You cant standup, you cant teleport home. Then you see the message, closed parcel, not on access list. Only thing left to do is to log off, and then log back on. Had I had some prior warning, I could have gone around this and continued my journey.
I suggest having these areas highlighted in some warning color on the mini map, allowing some prewarning that they are there.
Same with the aggressive security scripts that freeze you in place while youre vehicle is unlinked and scattered to the four winds.