It doesn't matter what I think of this, it is where it is probably headed - eventually. I think part of your argument about the abuse if the reward pool points to this as keeping it open to content will see an endless process of abuse, just at lower levels, which will create an endless process of abuse fighting at the general blockchain level, rather than pushing it to the communities who have incentive to keep their place clean. Weirdly, people don't see this as their place when it is everyone's responsibility - but they do want the communities they own and love to be free of abuse.