Not only did I not stick to ML orthodoxy while I was there (I'm more of a peacenik anarchist at heart), I wrote some fairly rude things when I found out how insane some of the tankies on lemmy can be. I hadn't expected such people to exist in reality, I had thought it was just a caricature invented by enemies of communism or something. Nonetheless they did not ban me or complain at all when I said that sort of thing.
Eventually I left because their list of blocked instances got too long for my taste.