Only a couple of people I have blocked, one of them was mentioned in this thread.... and the ONLY reason I block people is if they have pissed me off way too many times and I have better things to do, or if their posts constantly push my buttons. Because then I find myself in a crappy mood, and missing out on chunks of a thread makes more sense to me than constantly wanting to strangle someone.. thankfully people like that leave quickly, or only post threads about the Iditarod.