Context: PugJesus often spams low quality posts across the dozen or so communities they mod, apparently downvoting low effort spam on my frontpage is trolling. The only other action in the modlog is a different ban for 74 years for “Mass downvoting innocuous content,” so it definitely seems they are just banning people that dislike their spam. Glad we’re not missing out on the reddit mod experience here.
PTB/CLM.
I think that “Mass downvoting” is a valid reason for a community ban, but I would expect a temp ban if it is not a repeating behavior.
But it isn’t trolling by itself. That bad qualified ban could have a bad impact in others mods or admins evaluating the OP behavior.
May be in the future, communities should choose who can vote (subscribed, instance members or any user) and then only been show in the corresponding feeds. But I suspect that most of the mods that ban downvoters don’t want that they community posts don’t be shown in the All feed.