There is a certain issue that I seem to have with the term culling users. Apart from that, I totally agree with you. Decentralization brings problems and this is one example. Not that I don't want spammers to go away. I do, but many of these spammers are just bots. You also can't stop users that may get culled from creating a new account. I think that a possible solution is some kind of universal blacklist of users to mute but again this would still be monitored or run by users and would probably require yet another bot to help automate some processes. Once your account is on the blacklist, your accounts Steemit career is as good as over. It shouldn't be easy to accidentally end up on this list either. Especially if you make a few mistakes. This is where automation and bots could be an issue. Problem is that legit users would have to come across said list to mute bad apples. This is a difficult problem to solve. I just think that being able to remove users or accounts might also hurt the decentralized aspect. I would be interested in how a strict guideline would be enforced though. This strict guideline should be effortless to follow if you're posting your own thoughts.