People are saying you don't get to deck somebody over a joke, and I get that. I agree with that. Two things, though. One was that people do lose their cool. It might not be right, but it happens. More important, though, is that his wife was very clearly bothered by the joke. My hunch is that WS would have laughed it off were it directed at him, and likely could have dished some back. The dude upset his wife, though. Is he supposed to explain to her that it was just a joke and she should deal with it?
I'm not suggesting that bitch slapping Rock was the right thing to do. I think it was a measured response, though. Wil has trained to box, and I'm not sure how much in his life has prepared Rock for taking a real punch to the chin. Could have been a lot worse. Dude lost his cool, and honestly wound up hurting himself more than Rock, but it's hardly the end of the world. Shouting at the stage after he did was much more troubling, I think. Dude looked totally unhinged.