I've been searching for an answer about the following question and could find only a discussion in BGG without a final answer ( http://boardgamegeek.com/thread/859202/dark-charm-ol-card-to-steal-a-guest ).
So, the question is:
Can the Overlord force a Dark Charmed hero escorting a guest to move out of the map through the exit and so abduct the guest? (thus gaining in the process an overlord card).
The effect seems extremely overpowered to me, but thematically there are reasons for allowing it or not allowing it, so I'd like to know if there is an official answer to this.