The post I was responding to was advocating for a "smart phone age", i.e. the state banning smartphone use for people under a certain age like we have for alcoh

The post I was responding to was advocating for a "smart phone age", i.e. the state banning smartphone use for people under a certain age like we have for alcohol and other hard drugs. All of your examples are examples of regulations, not bans on a particular product. The video game example doesn't even involve the state; all you mentioned are private companies. I'm not opposed to all regulations. I just don't believe we should have the state deciding when people can or can't use a computer, which is what a smartphone really is. It's up to parents to decide up to a certain age, and after that people have autonomy and can make their own decisions.