Yeah he's an interesting case... This whole thing started when I flagged his posts that he spammed on other people's comment sections (I wrote a little dissertation on the matter a few days ago), Nevertheless as I've said many-a-time I'm really glad people like you guys have all banded together, so we can stand strong against people like this and protect the integrity of our community!
I think they need to change the rep system and either increase the power of the flag or to make the threshold from (-5) to (10 or 15), as It takes way too long for us (at least me as a dolphin) to permanently halt this sort of behavior from these types of individuals.