We'll have to get a real (i.e. not me commenting on HN) legal opinion should we get a take down request, but prima facie I don't see why these would be illegal.
(If they are illegal and we are notified, we would put them on the company maintained blacklist, as we cannot remove anything from the network itself.)
Edit: I wrote a rap on our perspective.
If you're having deep fake problems / I feel bad for you son
We got 99 deep fakes / And Jay-Z ain't taking down one