I mean it would be a cool feature notwithstanding that I personally have never seen a case where this could have prevented anything. Critical reading skills should prevent people from getting away with misquoting people, and lying about the contents of dms (or denying the existence thereof) would just cause a standoff where one party would look silly after theymos or any moderator? checks their PMs.

I'm guessing this might not happen in low-profile cases which I imagine would be the only reason something like this might be useful, but really in 99% of the cases it is immediately obvious who's the scammer and who's the actual affected party. (And again, if it turns out to not be that simple I imagine it would not be that hard for a mod to check the pms manually.)

I think the threat alone of an admin checking the actual contents of a pm would already make manipulation with on-site communication (pms) fairly unattractive. And really, wouldn't such a feature just cause a shift to other messaging apps like Telegram? Hard to see what exactly would be solved.

Perhaps development efforts would be better spent on finally making it look like this forum didn't come straight out of 2007, and more like their modern counterparts.