If the deep fake is of a real person, there is still reputation damage to the person featured.

That said, you're touching on something important. These people appear to be incurable, and it's about time we started talking about giving them some kind of outlet that mitigates the harm they might cause under the current regime of simply telling them they just have to restrain themselves. I don't know what the right answer is: VR? Sex dolls? Anything that will reduce the number of attempted incidents against actual children should be considered.