I've encountered it a few times. Had a DRG afk in WP after a wipe (!!!) in the second boss. He never ran when he was the focused target, and nothing I could do as a healer would help. So instead he just sat outside the boss room and repeatedly /laughed. :| Vote kick would be super useful, in the end I had to eat the penalty since my party were all whining and none of them wanted the penalty themselves.