Ok. First, definition of "feeding" from the rules on the main page:
If you're not familiar with the term, feeding is when you create several accounts and challenge fighters from those camps against one another. Feeding is against the rules as it pads fighters records, and increases funds for a camp unfairly.
First, before calling someone a feeder, tell him on his camp page that you believe that he is a feeder and tell him to stop. By his reaction, you'll see if it is on purpose or not.
I got to agree that Deaths and Death Cluths are pretty shady, but they don't always fight the same camps. They fought each-other sometime, seems to be belonging to the same guy. But fighting each other some times is not against the rules, even if its not allowed inside the community (for good reasons). Feeder? No, but it would be good to leave a message on his camp page to remember him.
The guy he fought 4x, from camp Skull Squad. Judging by his number of fight, the fact that he invested money (to at least upload an image on his camp page) tells me that it is a serious camp. They wanted to do a couple of match agains't eachother. Or, he realised that this camp seems to be figuring out MMartist and went for easy wins. Not necesseraly the best way to play, but not agains't the rules.
He fought Squirelly Wrath twice at the beginning of his career. I had fought this camp quite a lot of time. The fact that most of his fighters and his camp are on a positive record, so aint a feeder here.
I can go on, but I think you got my point. So in conclusion, it ain't the best camps I've seen around, but I doubt it is a case of feeding.
The main goal of this long ass post is to not let this thread being flood of camp that you think are feeder before having talked to the guy or a good investigation. It is good to look for them, you already pointed some in the past that were indeed pretty obvious, but in this case, I don't think so.
Peace \m/