It annoys me when people post answers to obviously off-topic questions like this one, especially after those questions have already received several close votes. Migrations seem to happen rather infrequently these days, so there's probably no reputation to gain for questions that are likely to be closed. And although sure, the answer may help the OP, it also encourages bad behavior (posting off-topic questions.)
My question is: is it appropriate to downvote these answers? Personally, I think I could make a case for both sides.