I could be way off here, and I could have the timing all wrong, but it seems to me that the waves of bannings at the TrekBBS and Worldforge......have tended to be when new Star Trek series were being produced!.
Seriously, for me personally (and I know I wasn't the only one), I was banned from the TrekBBS while Enterprise was still not yet two seasons old IIRC. And I was banned from Wordforge during Discovery's second season with the first season of Picard looming. It came also after I was harshly critical of AbramsTrek.
And lots of the slamming on both boards I received was due to my criticisms of Enterprise and Discovery (aside from the political disagreements).
I could be all wrong but there seemed to be an attitude at both the TrekBBS and Wordforge of
"These are Star Trek boards. You can be a conservative and everyone can hate you, but at least support the damned shows!". It seems at wordforge that much of shootERs anger at me stemmed from my criticisms of Star Trek in Media Central.