Comparatively to all other social media? lol no, not even close. I haven't seen this mob mentality of attacking users at all. Unless you're just talking about upvotes and not dialogue? Lemmy overall is super chill, very friendly and theres a tons of interesting, intelligent conversations going on. Is there an asshole comment every now and then? Of course, because assholes exist. Thats always bound to happen. I've been browsing every community on all, and I go through the various sorting types since active and hot are a bit buggy. Maybe its the areas you're hanging out in? I have seen people freak the fuck out over downvotes though, a couple of times. Reddit has/had really fucked with a lot of peoples ways of thinking in regards to social media voting systems.