You'll be able to trivially circumvent this, and the first people to figure that out will be teenage boys. And then what? Well hey, we can try to block the en

You'll be able to trivially circumvent this, and the first people to figure that out will be teenage boys. And then what? Well hey, we can try to block the encryption and tunneling protocols they use and make those opt-in too. Inevitably someone who "opts in to use encryption" will have to answer for it in a criminal trial.