User X is upvoting user y's low quality posts 10x a day with a large stake. User y is mining a ton of coins with no effort. If we, as a community, decide that this is "bad behaviour" then we can use a downvote? How would this work?

I appreciate the proposal and think that there is a lot of merit to it. I also feel that there is room for exploitation especially if it takes a long time to determine as a community if said event (or any other event that shows up) is, in fact, bad behaviour.