The real question is why such trolls are allowed on FR. For years.
I am scratching my head. Some mysteries are too deep for me. I wish FR allowed us to give out awards to certain posters. For the Most Arrogant and Condescending Award, curiosity would have no rivals. None.
Because they fly well below the radar, post on threads where they think they won’t be noticed, and tell people that bust them to never post to them again and hope that they comply.