It seems some idiots are trying to break into my Drupal site. It looks like this is some sort of a worm bot, though why it's using usernames like "purchase vagina", I'll never know.
Luckily the site seems to be holding up under this attack; I'm going to start blocking the IPs involved to reduce the log spam this is causing.
I keep wondering when I see this sort of thing.... Why the hell don't people have better things to do with their time??!
Prolly spammers...
It's probably spammers, scanning the net for <FORM>s and posting their SPAM to the fields more or less at random, hoping someone somewhere will read it. (Maybe they sometimes find a support request form that sends an email somewherer, a guestbook or it ends up in a logfile somewhere where someone will read it etc...)