Take downs and cleanups: The good, and the rest

I've been involved in take down and cleanups and whatnot for longer than I care to remember now, and along the way, there's always been one constant - the refusal of some hosts/ASNs/registrars, to do their job (i.e. enforce their AUP/ToS) and take action against abuse (and in most cases, to bother replying at all). eNom for example, who for years blatantly ignored abuse and were found to be