As an introductory note, none of this is directed at anyone in particular. It's just based on what I've seen here and elsewhere. I don't wanna start any shit; this is just kinda my two cents about etiquette.l
My opinion pretty much revolves around one policy: don't be an asshole.
Don't be a grammar nazi. Yeah it's annoying when people can't spell or fuck up punctuation but honestly, so what? Unless they made an honest mistake, you being uptight about spelling and grammar isn't going to change how someone types (any grammar nazi would know this from experience). What do you gain, anyway, from being anal about it? You get to feel superior to someone else? You "educate" them? Buddy, you ain't educating anyone; you're just feeding your ego. There's no way to pretend it's anything else.
Don't hold grudges. Don't start fights for no reason. Don't attack people. Don't gossip. Don't exclude. I can't say I haven't been guilty of some of these in the past, but I'm trying to reason my way through being better about it. I'm tying to hold my tongue more because, again, what's the point? It's different if it's an actual debate, and I also think that...