I think this, while noble, is probably not worth the effort. Surely this thread will be massive in just a few days. I always see the same ads with recognisable glamour models and one is even using
External Link/Members Only , these ads seem to be posted daily with minor changes.
Plus I only just now realised there's also dating section where escorts also post ads.
I just assume all ads are fake especially ones with professional pics and ones that look like Instagram selfies. Might be easier to say which ones are genuine.