Ban kicked players from instance for the remainder of said instance.

[themadnun]

I can see why you want to do this, but an easier solution would just be to set the timer for kicking players lower to say once every 15-30 minutes, that way if the player comes back, he is only there for about 10 minutes tops before you guys can kick him again.

But then the griefer gets to sit there AFK for ten minutes before we get to kick him again, then he rejoins and gets to afk for another ten minutes, and again and again...