Anyone who at least makes it to the BD discussion board at least once in a week must take note of that user @Sell100..

As you've said I've never see him come up with an original post..
He simply boosts his activity with online information(that he never fails to exempt himself from the resulting discussions) and he's so smart,he never forgets to put a link/source which obviously exempts him from our sanctions..and for God knows how he's got I think 7merits

Apparently he isn't breaking any rules,if he's constantly annoying you, you can simply put the user on ignore..
Sadly he's one of those who make high rankees put the entire section on ignore...