I'm currently dealing with this from jetigroup.?rg. The registry information is invalid, the contact emails I found for the guy who ran the company at one time bounce back, but a weak password on a mailman install let someone create a distribution list that allows every recipient to post. They broke the unsubscribe part of the script, so nobody can get off the list. Until I made a rule to kill all mail from the domain, the flood of "remove me, I'm contacting the secretary of state" messages were simultaneously hilarious, annoying, and sad.