"First, I havent heard of anyone saying it has happened, or at least is happening or happened recently. I would probably myself consider that bug abuse if you could put someone somewhere they can't get out of as that is an admins perogative."

There is an island a bit north and east you can only reach by flying. Arawn used to put people there. No way for them to leave if they had no wings or levitate.

"The fact that an AM can chain spells to put a token on you is also immaterial. Such an AM could equally well chain spells to kill you on the spot."

It's not immaterial. As has been pointed out repeatedly, killing is nowhere near the same thing...