I suspect most of us have seen that. I am mostly in agreement with the way pg runs this place, but in this one case, I think he's wrong. I must not be the only one, since this topic comes up every so often.
Yeah, giving him the benefit of the doubt, I imagine PG meant that in a different context than I'm putting it here - I'm saying that reflexive downvoting of thought-out challenges to your opinions is impolite, and asking people to please think twice before doing it.
