How does downvote disabling work between federated instances?
Context: I use Liftoff as my mobile client. I have accounts on blahaj.zone and lemmy.world. When I'm logged in on blahaj.zone on desktop, there is no downvote button. It appears on Liftoff.
It can also be used as a form of semi-covert harassment. For example, in an early instance, every bit of content posted by or in support of transgender people would get hit by a barrage of downvotes from brigaders using otherwise inactive accounts. Hard to moderate that without just disabling downvotes entirely.