I've seen spam robots harvest forums for e-mail addresses, then leave a signature card so they know they've already harvested and don't need to do it again, if that's the case, best to delete the post and the user etc etc.
Hmm - well puzzled by this - if it is a spam robot its got past the filter control to register and its also listed its website as some casino one - best refer to Jon to possibly lock his registration - just viewed his posts and they are all goblydeygook.