Actually, I think it's a very valid argument. Any poster who was guilty of bullying/badgering (especially ORG members) other board members, regardless of the forum, should be/have been reprimanded for it.
Debate within a discussion thread is one thing; belittling posters, especially newer ones, is quite something else.
Banning ORG from SD would not be my choice in dealing with it, but I guess it will work! It's like separating battling children, instead of punishing those who are to blame. It's easier that way.