Why would anyone post personal information at hotgunz stolen database site when the site does not disclose Hotgunz address or phone number or any other contact information?

Answer 1

Well... they do not appear to be selling anything so what would you need it for? Lots of legitimate service websites do not post their address or telephone number to prevent unwanted solicitation. Ebay did not have any contact information until recently and they are considered by most people to be legitimate.

Update: Check the FAQ on their site. That question is answered there.