[unprepare]

Wow what an insane example.

First, there a major difference between restrictions placed on convicted criminals, and restrictions placed on every citizen of an entire country.

Second, one represents a danger to the physical safety of others, and the other represents something that you would prefer your child not to see - do you not see a stark difference between a child being kidnapped and raped, and a child accidentally clicking onto a pornographic website?

Its not that complicated - we punish those who have committed crimes, we do not do so preemptively to entire populations.