Anonymous didn't release a list of names, it released a list of pseudonyms which is virtually useless (http://pastebin.com/88Lzs1XR). I presume these people are smart enough not to use the same pseudonym on other services so this list is pretty eminently useless.
Actually, I just did a cursory google search on a few of the more unique looking names, and they come up all over the internet. One of them is definitely not too worried, their pseudonym is also registered on a bestiality/zoophilia forum as well as some overclocking forums. I think this is definitely enough information to nail some of these people, with the right investigation.
