See myself I don't take them if they are yellow, I take mobs if they are roaming. The reason being because I see anyone who would take a group of mobs all to themselves as greedy assholes and by taking anything that is just yellow named myself I look at it as also being greedy. The game itself is flawed in the claim system and how it works and many people know that, the fact that people can be greedy like this in the 1st place is the primary flaw in my opinion as it should not be able to be done in the 1st place.