Can you back that up?
> Step 2: 'oh look at all these people bypassing the law. It's so simple for a child to watch porn with this.'
This would be a demonstrably stupid argument. A parent who simply opens the box and does 5 minutes of setup before giving their child a new $300-2000 device, and maintains the most basic awareness of any rogue devices (i.e. ask questions if a new phone appears) is all it takes to make sure no "bypassing" takes place in your home.
Anyone claiming "all these kids are bypassing it" would be lying, unless the law isn't even being enforced or sites aren't cooperating. And no law can overcome those problems.
Do you have children? Have you witnessed what they can do with restricted $300-2000 devices? My kids hack restaurant tablets at every place we go. I don't even know how they do it most of the time.
This is going to be one hell of a slippery slope. And the actual publisher-driven proposal in this thread is so much more useful; I would love to filter out anything with excess violence and generally NSFW content from my view of the Internet -- and I am over 18.