[Lestat]

It depends what your position is. I'm more inclined to 3-bet out of the sb, because it can be important to pressure the bb out. Your offsuited aces and kings play much better heads-up when out of position. Even 1 additional player (with position on you), severely reduces showdown potential and hence, profitability. If the BB plays well (i.e. he knows what you're doing and will play more tenaciously as a result), then I will call just call (instead of 3-betting), more often with hands devoid of high-card strength. But also notice that even this punishes the chronic stealer, since he now has to get through two players, making his steals unprofitable.

From the BB (after the sb folds), I 3-bet with most hands I think are best pre-flop or have him dominated. This is simple math and gaining pre-flop equity. Hands like ATo, KJo, etc. will dominate many hands a chronic stealer will raise with. It's important to punish those hands.