How are they even going to enforce this? There's probably millions of porn sites out there, and 99% of them are not even going to be aware of this law and not care if they do, especially in the case of foreign owned sites. This really just punishes the biggest sites that are aware and try to play by the rules (e.g. pornhub.) Why go to a site that requires verification when you can choose one of hundreds of thousands that won't.