Recently I been bothered by a user, via this forum and by personal email, and the same user has posted same questions over and over the XIFF forum.
Would there be by any change a possibility to flag posts/users as spam and someone then with higher power would moderate?
XMPP-Scapper seems quite annoying, but it doesn't seem that he's actually being evil. I wouldn't want to disable him for the behavior which I currently observe.
Have you tried telling the user to stop harassing you?
I replied in one of his/hers/its personal message and explained that usually if there is no answer within few days, no one knows the answer.
I also told to stop posting same thing over and over.
After this I still got the same thing over again.