> "would require every bookstore to verify the age of every customer at the door and, for minors..."
It's a dumb law, but, devil's advocate - isn't that how porn shops work? And porn shops also sell some non-porn items, too.
Yes, first amendment is not absolute.
https://en.wikipedia.org/wiki/United_States_free_speech_exce...
This is the difference between standing on a street corner shouting "shit" and taking a shit on a street corner.
The court is generally pretty adept at navigating the difference between "a bookstore that has some spicy books" and "a sex shop that has some non-spicy books".