That would be some serious BS and I would be legit upset :-/
It would be cheap, but also logical. Villains go out and do their thing even when we're not on their case, and they are just as capable of adapting as us. Unless they sit in their lairs stroking their terrible wands all day before going out to butt heads with us, they'll soon notice the teleportation ban and start working on some workarounds.
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Twostuck, Homestuck RPG: http://www.gamefaqs.com/boards/8-gamefaqs-contests/62168402