If you're a bad actor, you could block anyone who downvotes your bad takes or whatever garbage you're posting, and over time, you could block most active users (or at least the ones who disagree with you) until your posts aren't downvoted into oblivion. I suppose by then, your total rep would be pretty pretty low and it would probably be easier to just make a new account.
I'm not sure how viable this would be, just a thought.