Best way to detect ASCII nudes on Steam profiles?

If anyone is familiar with Steam profiles, and specifically the profile pages of Valve's CS2 players, you will know that quite a few profiles have pornographic or nude ascii art in the comments.

These pages are publicly viewable, but would be viewable if you were required to have a Steam account. I'm not judging them morally, although Valve could easily do something with the privacy settings or remove them.

I've scraped lots of these Ascii porn comments, I've rendered them as PNGs via headless Chrome.

The problem now is that no LLM model is successfully detecting the PNGs as X-Rated because they work as visual illusions, in a similar way to bi-stable images (e.g. rubin's vase) or more accurately they work in a way similar to Pointillism (Gestalt).

Can anyone suggest an ML technique or model that would detect them successfully? This is just a side project for computer vision.

== Examples === * NSFW! NSFW! NSFW! * Example 1 - https://pastebin.com/7TfsvvLB Example 2 - https://pastebin.com/BmnEJxEd