StarCraft II Beta: Who is BetaWorks?

I never have seen this happen before in the hundreds of Starcraft games I've played. During a 3v3 match, my own player attacked and killed my base. I did a sneak attack with cannons and then my own ally attacks my base and then leaves the game. What the frick was that? I've never seen such odd behavior. Some player named "Betaworks", which will obviously change now or after the beta period. Maybe I was attacking his frirend? Random act to amuse himself? Just a complete idiot? Who knows.