I am not too familiar with Cura, but I don’t think they have the ‘support painting’ feature of prusaslicer and the likes that would allow this. In those, you can paint where you’d like your support to touch or use modifier meshes to selectively add regions that should be supported. It’s the easiest way I know, though I have heard that Meshmixer also used to be able to do that… but I’ve never tried.

Check if your print is wobbling when it reaches that height. If it does, you may need to add support to fix that - a few organic support touch points halfway up should help

On top of some of the other tips, layer height being the most prominent, perhaps try a different soap or clean it with alcohol after. I’ve noticed a difference between soaps (and even between toilet paper brands) - some things leave a bit of residu I think.

My condolences

Interesting, thanks for the insight!

I’m not well versed in this at all, but would this also work if the “attacker” were to take a screenshot of the image they wanted to alter, and plug that into an AI tool? It sounds more like metadata tweaking from the article, which would be bypassed by a screenshot.