My best shot has been "Lemmings". Also I, personally, hate "Fedizens" so let's hope that one doesn't catch on.

Lemmings, most commonly used, or at least the majority thought it was appropriate.

For KBin... probably beans, lol 🤣.

@EpicFailGuy The question was coming up often enough I made a board for itm, though the second I made it the question stopped coming up. @namethefediverse

In experience i've seen kbinauts, kbinners, and kbinators for Kbin. Lemmings and lemmies is the favored for Lemmy. fedizen for fediverse users.

For people on sh.itjust.works it would be shitters