Personally, I wouldn't say that there's any particular convenience for non-English speakers to have the person correct his post. It's just that when I see someone saying something like "u" instead of "you", "ur" instead of "your / you're", "4" instead of "for", "str8" instead of "straight", "ne1" instead of "anyone", I picture an immensely lazy jackass. Honestly, how the hell much time does it save to leave out three characters? If it really saves that much time, give me your address so I can come over and beat the stupid out of you with a brick.