I wish I knew the answer to this. That was one of the things I wanted to do with CommentWealth - flag spam comments so minnows (or really anyone) wouldn't have to get involved, but it was a manual thing that became too time-consuming. And then we all had to remove our delegations, so the account can't flag with teeth anymore. I still think having an account that's not trying to build a following making the flags is helpful to the community so they don't have to put their reputation on the line, and having more than one steemcleaners-type account - I can envision several of these that rumble around the platform scrubbing off abuse. Maybe someday, in a perfect world...