I’m aware that instances can block interaction from other instances, but if done correctly it would be easy to do it without raising much suspicion.
I don’t think it would be. A sudden influx of votes from users from a new instance who never posted or commented would be pretty obvious I’d say.



I don’t know if there are currently any automated systems against it, but with Lemmy votes being public, I think that someone would notice it happening sooner or later. If it became a huge problem, automated systems could certainly be developed.