Quote Originally Posted by Pex View Post
That's not a problem of teleport but of the common DM problem of when you plan for A, B, or C players will choose D.
This isn't as well-tested as I would like, but a method I've had some success with is to simply ask players ahead of the session what they intend to do so I can prepare for that in particular. Sure, in the middle of the game the players might suddenly realise they want to do A after all and force you to improvise, but at least you didn't waste time preparing B and C or get blindsided by their initial choice of D.