I've been in a bunch of groups within PotD with people who are just completely selfish scumbags that won't do anything more than they need to for the run. In PotD you're suppose to be a party that works together to complete the 10 floors. Some people/premade groups make it a point if you do something they don't like, they don't tell you the whole time and wait until you're on the last floor to spite kick you. You should not be allowed to kick someone on the last floor. if the person is AFK though and not moving i can understand them being able to report the person for AFK but not for kicking someone.
These types of things draw me away from the game because it's completely childish to act in this way.