I almost ALWAYS edit my posts, for various reasons, typos, clarity, to retract harsh statements, anything, really. Is this a violation of the Terms of Service? I don't see anything wrong with it. Sometimes I'm angry, and I post something out-of-line - what purpose does it serve to let it hang there for people to get pissed off about, when I can communicate those same thoughts in a "nicer" way, later, like on the next day when I'm not so mad?