Pooh kept on playing, won and blacklisted the prick. The same thing I do in these situations.
This.
But seriously, would not being able to allow the AI to take over for you not be a better option?
The AI isn't smart enough to create a win for you, but if you're already in the winning position it can finish the game for you, even with a troll trying to draw the game out. Problem solved, no?