When marijuana became legalized in my state, you had to verify your age and they wrote down your ID in a book. It quickly went away because its draconian as shit. I'm not ashamed to buy weed or alcohol, or look at porn, but I still don't want to create a written record every time I do it.
I also generally don't agree with the moral panic that conservatives want to generate about porn. Most kids see porn and have since porn was produced. It's on the parent to, you know, be a parent.
These laws have nothing to do with protecting children and everything to do with social control.
We're talking about a state that imprisoned a women for being topless around her children. These people are dangerous and want to enforce their fringe world view on everyone they can.