I always assume anybody that cold calls a 3bet with the original raiser left to act 100bb deep or so is making a mistake. I think we just cap ourselves at AK/AQ/QQ/JJ when we do it and therefore make life easy for our opponents. I know a lot of better players than I that will disagree however.

I think the only exception might be if we're nutted and the open raiser is a maniac.