I've gone into PVP a few times as NIN using my Hide at the base and defending and been kicked 4 times now for doing this. I inform the party on what I am doing and if a few people rather me do something else, I do. And no matter what if a crystal is close to the base I do help attack it. I do help players if a team is pushing close to the base. If it's one person complaining and others are encouraging, I do my base strat.
Yet I've still been kicked for this. I've reported all the times this has happened. 3/4 of the GMs I've spoken to have told me how I was kicked unjustly. The last GM had me concerned though. Apparently to this GM it is justified to kick a player for not playing the way you want. The kick button has four options. Harassment, Cheating, AFK, Offline.