There is in fact a hard solution to all this. It is the ending of anomimity. You will be wlecome to use handles as we all do, but it must be always possible to right click in order to review the individuals profile which needs to be independently authenticated.
That rule also needs to apply to securities tading and many other commercial transactions.
What this does is that it does not stop viewing porn per se but it stops material whosesource cannot be tracked.
The internet has made simple criminalzation an exercise in futility. Yet it can all be reduced to the crime of criminal impersonation in most cases if the system is made such that this becomes the only way to move forward.