Actually, it's been proven to be a very ineffective deterrent in child psychology studies. It just teaches them to not do it when your actively present and try even harder to not get caught.

Plus the lifelong psychological scars of being assaulted by a figure you trusted to keep you safe from harm but those are a separate topic.

IF they find out.

My mom kept her purse by the door, mostly, not in her bedroom. If age verification had been an issue, I would have sneaked downstairs at night, slipped out her DL, taken a photo, and registered on whatever sites I needed.

If they sent some sort of verification to her email, I'd just log in, answer it, and delete the email. Of course I know her passwords, I showed her how to do it, and I'm always fixing some dumb thing she did.

Any kid is going to figure this out faster than me.

How would they find out if you put it back immediately after using?