The worst thing of the community is not the feeders, but the enemy defending them.
Feeders feed because they suck at the game or they intentionally feeding, if we ignore the intentionally feeding part, the rest isn't really up to the feeder's will. If the feeder is just bad at the game there is nothing in his/her power to stop feeding.
What worse than feeder is the opposing team who got fed off the feeder, and claim the feeder to be rightful, not because they are against the toxicity toward the feeder from the feeder's team, but because they are getting advantage over the feeder feeding. This might seem minor, but if you put this scenario in real life sport it becomes super dirty. For example in a soccer game, you goal keeper is the feeder, and he leaves the goal open whenever the enemy team shoot. The enemy team stands up for the trash goal keeper because his act of "feeding" lets them win the game. Does this seem right to you?
I am honestly disgusted by these guys. If the feeder is feeding, he/she deserve to be called a feeder. Defending the feeder just because oneself got fed off the feeder is disgusting.