I think the more donks at the table the more you bet pre flop with AA. I the donk wants to call with 2 3 off let him. You will win most of the time. Perhaps a larger pre-flop but once the guy saw 2

's he was in for long haul. That is how people play in free rolls. Knowing that I probably would of shut it down after that. Unless I respected his play then I would keep betting and price him out of pot. But if he does not know to fold pre-flop with 23 of

to that kind of raise then he is not gonna know to fold it after.
I've had my Aces cracked before by some ridiculas hand and it hurts.

But you raised pre-flop and played well. Nothing else you can do. On the bright side there is a donkey out there that thinks chasing down a 3 high flush is a profittable play! I hope I am the lucky one who gets to show him he is wrong. Or maybe you will be!