My thoughts exactly.
Such guys freak me out.
Actually I think some of them are poor people with the asperger syndrome and no friends, and they really think that they are posting something interesting.
But the freaky part of that assumption is: If they think they post something useful, then why do they register different accounts? That says they know that it is dumb and don't want to be recognised.
So they do something similar to George Orwells "Doublethink".
So I don't know whether I should laugh about them and dislike them, or if I should just pity them. Most time I do the latter. Poor guys. I was similar to them, some time ago. (but I didn't have internet back then...)