Most of SoSe aren't banned on SA, but just stopped posting. Im fairly sure my SA account is still working but I haven't logged in for years. SoSe itself started getting a bit too stormfront-lite lately, people are taking themselves a bit too seriously.
That said, Lowtax is cocooned in a thick syrup of self-deception. On TNE and SoSe we had threads with documented evidence of admins having shit lists, fistgrrl used to monitor other forums and ban people if they smack-talked SA, abe was fucking rekt after mocking a teenager's penis on twitter, aatrek's pedo history came up after literally just googling his name, McCaine was a commie fag pedophile with an ice-cream cone for a dick, any mention of mangosteen was ban-on-sight, but lowtax isn't interested in having constructive dialogue about his forum so there's little to no point linking to the threads.