Never encountered this before, but i've only been PvPing a few days. They would kill everyone except me (the tank) and then leave me alive. Just sleep/stun me and dance etc. Nothing I could really do except wait for them to get bored, or leave. Faced the same team multiple times and they did the same thing each time.
If they're trying to discourage people from queuing up for the PvP then they're succeeding.
