Symantec SecurityYou can get the ISP's information through their Whois application, but the ISP will not give information without a court order, or federal jurisdiction. An ISP may also charge you to release that information with the right documents.
Speaking of which, the guy who ripped me off on eBay is currently undergoing litigation by Paypal, and Paypal refuses to give me this guys information. I think it's commy bullshit.
The internet is all fucked up this way, and unfortunately I have grounds for a lawsuit, to sue paypal right now. I guess I am eligible for a class action lawsuit as well, but fuck the class action, I'll go after them myself.
No amount of fancy ass lawyers, or legal loopholes is going to keep me from sueing their pants off.