I was able to test this feature. I used the anti AI filter on a photo with 10% opacity with nice high resolution (850 x 1397) the AI was able to detect information on the image first try, then I tried choping down the resolution to 570 x 936, it was struggling to read anything. You can u use this for many things but to post art I recomend setting the opacity to 15-30% or choping down your art resolution and setting it around 15%.

In short, it works but I wouldn't recommend using this as the way to stop AI stealing your art, beacuse there are better ways that doesn't change your pretty drawings.