Here a link to the poe. Look at the user monsterous(or whatever his name is) latest pve activities. As you can see he enjoys being carried he stays long enough for the rewards and does the least amount of killing. If I had the deal with a player like that I would do it too(I do but im usually not party leader). That guy does not deserve the rewards and like op said he would probably just join another person and do it again.

Kicking him at the rewards room (I use "rewards" loosely, it's Prison of Elders after all) will not make him stop leeching. Kick him when you know he's leeching. You're just as big of a problem as he is otherwise. Also, based on math, there's no way he was in there for the entire 1h 4m 27s. Not a chance. His average lifespan was around 2 minutes. He would have died approximately 30 times in the time it took for these kids to beat this activity. He only died once on his Titan and 13 times on his Warlock. That just shows that this guy is either exaggerating his story, or he kicked the user early on. Another HUGE point is that he was clearly on one character and they let him rejoin on another. Yea. There are quite a few problems with this guy's claims.