There was a politics subreddit I was on that had a “downvoting is not allowed” rule. There’s literally no way to tell who’s downvoting on Reddit, or even if downvoting is happening if it’s not enough to go below 0 or trigger the “controversial” indicator.

I got permabanned from that subreddit when someone who’d said something offensive asked “why am I being downvoted???” And I tried to explain to them why that was the case. No trial, one million years dungeon, all modmail ignored. I guess they don’t get to enforce that rule often and so leapt at the opportunity to find an excuse.