I think it's time to build a new system - something that can annotate the post the user is on, if there's at least another savvy user (or AI system) that can pick up on the uncanny signals. This youtube video about the "Walker Family" sham on Facebook is particularly relevant here:
Don’t Pay This AI Family To Write You a Song - https://www.youtube.com/watch?v=u-DDHSfBBeo