It's interesting, how most of the time you can tell if someone's bad spelling or grammar are caused by him being a non-native speaker or whether it is because he just can't spell or doesn't care. And also, my own spelling abilities aren't so great either, but that's why I use spell-check, (Firefox and Chrome both have it and I'm sure most of the other browsers do too) sure, it won't show stuff like Lucas is a lair (still funny) but it will fix stuff like double letters (one of my biggest problems - speak of the devil, I just typed bigest :-) ) and stuff like that.