Anybody using TPB is operating in the open anyway and any logging by CloudFlare is just an extra layer on top. A lot of people using torrents do not understand their IP address is clearly visible to anybody else in the swarm and tracing them is trivial. I rather shocked a friend when I showed them the "peers" tab on his torrent client and did a whois on several of the addresses as they thought the whole thing was totally secure and untraceable.
If you are going to torrent TPB is the very last place you should use as it is nothing but a pool for police to fish. I don't even see why they insisted on getting it blocked in the UK as having it available is nothing but a boon for the authorities.