I write this comment like my proposal would be accepted without modification.

I think there would be UI-independent groups who would voluntarily investigate the flags behind the posts. They wouldn't need notifications from any "official" UI but a bot that would scan the blockchain continuously for flags. They could defend the poster, start a debate with the flagger via the flag comment section, or flag the post more when they see it appropriate.

I could think about @anyx as the best example. They were able to create @cheetah as a bot, and @steemcleaners as a community. They work solidly and very politely. I think they have the experience that it would take, and not they are/will be the only one in long-term.