Personally, I would hope if I made an error that prevents my point of view getting across that someone would point it out to me. The thought of looking ignorant and having people look down at me for bad grammar and spelling is something I dread.

If I have made an error it is most likely because I am not aware of that error to begin with (obviously not slips of the finger, but sentence structure and the like) so please, pull me up on it.

My biggest gripes are you're vs your and their vs there vs they're.
I am surprised more people don't feel ashamed about using a written medium and not having a basic grasp of the English language. Especially when it is a forum in a English speaking country.

Well, at least the non American forums I am on

I may not be perfect and I certainly don't always have perfect grammar and spelling. But I fail to see why that should prevent others trying to try and use correct grammar. To be honest I would like to think that people had more self respect and if they did something wrong and it was pointed out they would try and fix it not sit there going "Yeah, and? So what. You'se isn't yourself perfect!"