Because the first 4 letters of their name is Anon, and o sounds like u so it is now Anun, make it two words it is A nun, and since a means no, it means the are the opposite of a nun, meaning that they are probably a not very good person now this back to anun, it looks like anus, and anus is a synonym of asshole, and synonym looks like nymous so it has to be a synonym, and since an asshole is the opposite of A NUN, it means that anonymous=asshole