[Fangz]

I can see what you mean, he does seem to spread bitchiness and backstabbing like a disease.
However, I don't think it's a tactic, he doesn't seem smart enough. I think he just bitches behind peoples backs because that's the real him, a bitchy little wimp constantly trying to convince himself, and others, that he's an interesting, confident person, which he obviously isn't.
You can tell how insecure he really is by his reaction to the new housemates (posted by coltrane).