And the mod(s? was it ever more than one person?
Quite honestly it's difficult to tell whether it was all just an army of sock accounts or if this user (still going as ziq over on raddle) had actually managed to recruit some loyal followers into their weird little purity-testing cult or something. Either way, it's pretty fucked up.
But it did teach me an important lesson, though... any online space dedicated to leftists is going to inevitably attract these dangerous and toxic Napoleon-types (yes, I am naming them after the pig in Animal Farm - I'm going there) - people whose "leftism" only consists of that which facilitates their megalomania and who has the time and resources available to them to subvert those very spaces. It really explains why tankies have such a toxic presence online. Leftists should never fool themselves into assuming that someone understanding leftist theory automatically means they are acting in good faith.
So I don't get too heavily invested in leftist-only spaces - I prefer being out there engaging people and doing counter-propaganda. It just feels a whole lot more productive.