Generally, this blacklisting makes sense for safety reasons and avoid shady folks. However, its a double edge sword where even genuine and harmless hobbyists are being blacklisted. I for instance, a longstanding terb member, got blacklisted just because of a misunderstanding with a Durham SP (I never met but wanted to meet) and she was not having a good day. Now I can't get any appt with Durham SPs. Sucks!