About why this is now an issue if it's existed for decades? When I was a kid, it was easy to find all kinds of illegal stuff on the internet. That doesn't mean it was OK then or now. I don't think fake porn has been that mainstream until recently. There were some high-profile cases that raised the issue in the media. Personally, I believe that it was always a bad thing to photoshop someone's head onto a porn star's body without their consent.
https://leginfo.legislature.ca.gov/faces/billTextClient.xhtm...
https://www.jdsupra.com/legalnews/if-signed-by-governor-cali...