You can't exactly stop people from cheating like that by adding rules or anything. If they cheat and it's obvious that they've cheated, then the community will naturally add a penalty to that and they will be punished on a case by case basis.
As Rakudo just said, it could simple resolve by deus as simply as it would have the other way of the would be escapee, if the community were to agree with such an action.
This doesn't really need to be said, but it is reasonable to note that--like any community--SL is primarily defined by the players, not the rule makers. Things which a majority agrees should happen are the things that should happen. In that vain, I'm certain that any player found guilty of being, to be frank, an asshat, will be dealt with as naturally as breathing. Rules just set guidelines for people to follow, they do not in and of themselves carry weight, but rather the people themselves have the power. To that note, we shouldn't have to define every possible event and consequence before any arise.
-Soapbox over-