I really like the solution that @ciska offers.

A discord channel where actions against abuse will be coordinated.

I think the best way to solve this problem is using human support and not leaving it in the hands of robots or AI (I guess they are not yet aware enough to be excellent judges). And the best way is to present the cases live on a discord channel. It is important to use the support of many people to do this and the flag can be a way to warn where the problems are.

Thanks for reading