Competent kid who I don't really have any info at all on except that he does well, and he knows I'm competent, sits at a table with myself and 6-7 other very bad players at the local 2/5.

Limp, Limp, kid raises 35, fold to me in SB with AA and 500 effective (all involved have 500, limpers included).

I raise to 80 and everyone folds.

Should I flat here given that we have no history? How often should I flat here given a history that I'm a frequent 3bettor? Limpers both call if I flat 100% and play medium-bad OTF. If they were the worst of the worst I think I'd flat always.