I only use proper grammar around graal or some other gaming communities,and even on school projects.
But when it comes to texting friends,chatting on facebook,or basically when it comes to my 'real' social life,I don't want to seem like a nerd. -_- It'll probably be acceptable when I'm in college,but as of now I'll probably never get pretty girls again if it's like this 24/7.
But I do see where you're getting at,It makes me kinda mad how people can't spell and I think certain people are not from the U.S. but it turns out they are just very low in the academic area. :/