I have come across a group of 4 cheater that run shootout together.
Mr-Kamps-A-Lot
Roland_Deschain
Give-it-Wings
aMiniVanMan
These 4 people go under the sawmill and melee each other or headshot each other so that they are constantly top 4.
There is another guy that runs with the same people as well, Brymal_Rage
There are complaints across multiple facebook communities. They even message rude comments to people in the shootouts. It is very toxic behavior.