The thing about stake-vote-negation is that it is pretty hard to find something simpler and more elegant. It works both to counter curation-related abuse and author-reward related abuse. It greatly reduces the mental overhead involved in policing abuse and it is not technically complex (it's basically just an inverse of delegation).
It's almost like he's okay with it as long as it paints Marky/the platform in a bad picture.
Stake-vote-negation flips this on its head. Now Bob doesn't get seen as a nice guy just giving out upvotes randomly, but as just some neutered account. Alice doesn't come out as the bad guy.
The main problem with it in the Steem days no longer exists - that is that steemit being a mega-whale could have potentially negated every other player in the system and still had stake to spare. The stake has been much more widely distributed since and there is no longer a single whale account with that level of power that could potentially be abused.
It turns out, Carol was me the whole time.
I hadn't heard of negative delegation before. I can see some merit in it. Delegation is one of the secret weapons of Hive anyway. Any of the tools can be used for evil, but then the platform should be neutral and let people decide how it plays out.