You forgot to mention Armory1472.
I commented on them earlier on another thread. Three of them appeared yesterday, with the same posting traits: They revived old threads that hadn't been used for some time, and they posted nonsensical posts loaded with links. The threads they chose seem to be random. I was looking for a common theme or keyword or creation date that might have lead to their choice, but so far have found none.
I believe they are bots. Could they be a manifestation of the 'conficker worm'?
Quod scripsi, scripsi.