Yeah, I usually humor that sort of person in the hopes of not pissing them off, because if you've already established that they're crazy you can't count on them acting in a rational manner if you get them angry.

But it's not like I feel like I'm doing the right thing. I mean, yeah -- it's what I did 'against' bullies in Jr. High and it worked about as well as you'd expect. I didn't get physically beaten up or have my stuff stolen, but I was regularly humiliated.