Sure...But I think your mixing anonymity with privacy.

I understand p2p is not completely private. Back when I started using Bearshare, I didn't understand this as well as I do today. I call it anonymous because people may see my IP address, but they don't know who I am. I guess they can call my ISP, but I'm not sure they will get my name (Hmmm....come to think of it, I'd better take a closer look at that contract).

As far as privacy is concerned, I would still argue that polling for an ID, PW, and email account to register a p2p program is less private and not anonymous at all. I could be wrong here, but if they are recording this info centrally to track usage, connections, etc. (which may be used legitimately to make the network more efficient) then it's available for someone to look at.

FYI - It sounds like your ISP is not so bad. Many of the stories I've read along similar lines usually result in a disconnection of service.