Abuse and Complainer Blacklist
I don't know if it will be of any great benefit to anyone, but I send to 10million+ domains and I deal with a lot so no need for other people to have to do deal with the really bad people and complainers.
So here is the link, Ill add any Hosting Abuse complaints and any really big complainers. By that I mean if a domain filed an abuse complaint to my host or if they called up and made a big fuss over and over or sent multiple messages or threats.
I have more then ones on this sheet, but I just didn't track them specifically and I just added them to my general blacklist. But this is a start anyway.