>>38320290/stars/ are relatively small, so it's easy to pinpoint who's who from their posts. Pretty sure people who've been posting for long enough managed to identify a fair number, and also realised when and who goes in and out (discordfags or catalog tourists raiding for instance).
There was one easily identifiable anon who posted midnight to morning JST just to shitpost and samefag with 2-3 IPs like 10 months ago. >everyone knew him because he was ESL with an obvious dysfunction in how he posted, so it was easy to ignore.