Okay, how many times do you edit your posts? There's a nifty little thing I found that if you edit as soon as you post, the little "edited last" notification doesn't show - I guess if it's within the minute or something. So I keep abusing this feature, and post, and then edit and fiddle with it and stuff. I'd say I edit every post at least once - be it for grammar's sake (mostly), semantics (you have to phrase things carefully or people go nuts on you) or content (like changing my mind about something or stuff).