Yup it's looking like we'll have the ability to "opt-in" to follow blacklist suggestions from other users like HiveWatchers. That being said if a user doesn't find a need for blacklists, or they disagree with a list, they aren't forced to have their interactions limited or flagged on the platform based on those user's elevated opinions.
RE: What do you think would happen if all "formal" abuse fighting services stopped?