I was having an interesting discussion with a friend about a game he was playing when a frequent squeezer was to his left. He said the guy wasn't really too loose or aggressive, but he just especially liked to squeeze. Even when he 3-bet and got called, he would tend to not barrel too hard after the flop.
Friend: "So since the guy kept squeezing, there was this hand when the button raised, and I had AJs in the SB. I would normally 3bet that against a button raise, but since the BB kept on 3-betting in squeeze spots, I decided to just call so he would 3-bet with a lot of worse hands that he would otherwise fold if I 3-bet."
Me: "Really? I would do the opposite. I think AJs plays better as a flat in general. I mean, the guy is never folding better. You think he's folding AQ? And he shouldn't be calling with worse. You think he would call a 3-bet with AT? But if the guy keeps squeezing, I might 3-bet with it just to avoid being OOP with the hand. I mean, it's not like you have AA or KK there. If you call his 3-bet, you're still OOP without the betting lead, and you're still going to miss the flop a lot of the time."
So as a concept check, what range would you flat in this situation, and what range would you 3-bet?