It should be in Meta instead. Negging the user wouldn't do anything to stop the spam. The user looks like it should have been banned by now.
If you ever get this kind of messages again, use the report to admin function and report it as unsolicited junk PM.
Ah, I see, sorry was a bit unclear with that sort of stuff. Do you think in the future we will be able to prevent these sort of spam bots? Say we can ip ban them or something like that?
Anyways, thanks lauda for the neg.