I would hope the #purecuration trending page would attract some scrutiny and the community could self-correct on a best effort, and that the consent to get flagged if caught would keep many away from trying to cheat.

I might write some visualisation scripts (like the flag-wars scripts on @pibarabot) if the tag catches on if I find these might help exposing specific types of trying to cheat, but mostly it should be a community thing of people agreeing to use the tag as intended and inviting flags if they end up, basically doing the equivalent of using steroids in preparation for an all natural bodybuilding competition.