Exactly. And some people view every post as some kind of assault on their own views or values. It makes me reluctant to post anything that may be quite radical or a unique take on something, because no matter my intentions, someone takes umbridge at it (and they really shouldn't, we need the wood).
Anyway - I don't mean to step on anyone's sacred cow when I post things, I'm just trying to bring a new slant or point of view most of the time. I'm fine with someone saying "I disagree, and here's why." I'm not fine with people saying, "I disagree because you're a stupid idiot."