I'm pretty sure it's a fake name. 4+ years ago I mailed something to him and the name he gave with the mailing address was completely different (no I don't still have the mailing address, I'm not that organized) and I've heard that same name bandied about elsewhere (at least the same first name). But who knows it could also be fake.
http://www.encyclopediadramatica.com/CP
Also, CP stands for Christopher Poole. It is quite likely that Christopher Poole is a fake name, chosen becase of the CP meme.