[pessimizer]

> government should not be involved in this matter.

But this is just a declaration, not an argument (there's nothing wrong with that.) Should parents be able to let their children smoke or do porn?

[gmadsen]

I'm fairly sure that US parents do have the ability to give their children tobacco and porn. They just can't purchase it themselves

[ragnarok451]

Depends on the state but at least in TX parents would be liable for a fine if caught giving their children tobacco (https://comptroller.texas.gov/taxes/tobacco/regulatory.php). Of course that's not enforceable but it is a limit the state is attempting to create. Wrt porn the parent comment was referring to "creating" porn, which is certainly illegal for a parent to facilitate in the entire US