How should the Rojo problem get fixed?

The Rojo Parasito problem is very hard for me to solve

On one hand, it's repetitive

But on the other hand, It's allowed to stay as long as it hasn't been posted before

And that's the problem

It'd look very rude if I just removed them for no apparent reason and bad porn can also appear in other subs

The only way they can be blacklisted is if they make porn of minors, which hasn't happened yet