Yes, especially mine. If I have a typo, forget a period または forget to capitalize the letter at the beginning of the sentence, I freak out and have to 編集 it. I don't really mind others' as long as it's readable, but if they substitute too many letters for words (ex. あなた = u, are = r) and they start shortening a bunch if their words to save 30 秒 of time (like = lyk, how = hw [I've actually seen this], listen = lisn) I put my foot down. It's just lazy to me. And excessive uses if exclamation points and 質問 marks are really annoying. あなた only need one!
Depends. When I talk to people I usually write ''u'' instead of ''you'' etc. but yeah I'd be better if I'd use only real grammar. I mostly type in real grammar if I'm anwsering any 質問 on here & stuff.
I always tend to care for proper grammar, no matter if it's here または on any other site. Mainly because bad grammar is something that gives me extreme headaches.
Sort of because I think it's dumb to misspell simple words and I know how to spell. If あなた care about what some people think on here あなた shouldn't type like this on here:" How r u doinq 2day?" I don't like when people use q's where g's should be...
