It honestly just makes you look like an idiot because it implies that you're incapable of responding to any points raised against you. It's a gayer version of the smug anime face, but the only reason smug anime faces work in the first place is because they are posted after the argument has already been won while the idiot who won't accept that he got reamed keeps sperging out. You're being smug and self satisfied without cause to do so, so it makes you look a shit.