Grammar and Spelling Nazis

Really, what is the deal with people on message boards etc, that feel the need to point out every tiny little typo out there?
In before people try to point out all the grammar and or spelling mistakes I made typing this thread to look like smart asses.

grammar and  spelling nazis are pathetic losers who have no ability to argue there case or have already been ownd and the only thing they can think attacking is grammar--what sacks of shit.