[Angrist]

It's just quite impolite to make fun of someone in the audience. They can't talk back, they can't defend themselves.

Of course, it happens all the time. It probably happened to Obama as well. But that doesn't mean the leader of a country should resort to the same thing. For me (and I know you'll all disagree) it changed how I see your president. I always thought he was this really nice guy. Not anymore.