reverse e-mail search

anyone know of any free reverse email search sites or programs?

On a forum I admin, we have a someone hacking other peoples info and making it look like they are banning themselves. We believe it's someone that was a member at one time.

Any help would be greatly appreciated.

I haven't heard of any such programs, though i will keep my eyes open.

lol?
tracing email?
What Is My IP Address? - Trace Email Address Source
email thingy that u said:
Email Search, Email Lookup, Reverse Email Search, Email Address Search, Internet Email Address Finder at FreeSearching.com