can't be sued if its true though, so simply stating the member of the forums who came to pick up the parts, and stating that he believes that one of his tag alongs pocketed the camera will not get anyone into any trouble whatsoever AFAIK.
I'm all for naming and shaming, let people know who to be wary of etc.
I never let people come to my house from the internet. Everything I have sold on ebay or forums, I have always made them meet me somewhere (usually use the excuse that my house is hard to find etc)
Same thing when selling the seca, if you wanted to come look after seeing it on the net, then Id organise to meet them at a servo or shopping centre, always took two cars (missus in the commodore just in case)
I have too much stuff around my house that people might take interest in for later (although the dog scares most people off)