Who cares about grammar? Seriously people, this isn't school, this is a damn forum to chill with your friends, not have a lesson on grammar. If a person has poor spelling, how about you guys think for one second of the possibility that English isn't his first language? If so, the kid just doesn't know how to spell. So what?
The fact that you guys talk perfect makes you better than anyone who doesn't? Shut up, seriously. If you really want to debate on who's better than who grammar wise, then by all means, share each of your English grades on this forum, and sees who has the highest.
At the end of the day, it won't make a damn difference.