It's not your average freak with a fetish that is even the primary issue. The volume will come from average anybody (although mostly men). That's the real problem. Random co-workers in the office that want to deepfake their crush. Your average teenage boy with a decent GPU that wants to deepfake their classmates just to experiment. There have already been several instances of this catching the news in Europe for example, so it's obviously going on globally.
Oh but the average guy isn't that perverted? Yes they are. We know this from the vast amount of porn they consume and of what type they consume.
Actually nailing someone for revenge porn or sexual harassment seems like a borderline impossible task for police departments if the person doing it has even a minor degree of anonymity. Enlarging the potential pool of people who can do this and the pool of victims they can target by an order of magnitude by lowering both the skill it took to make convincing fakes before and the time taken to make each fake doesn't seem to me like a good idea.
Oh but the average guy isn't that perverted? Yes they are. We know this from the vast amount of porn they consume and of what type they consume.