I ran an online web forum in the United States and had the COPPA stuff, had an online fax service where parents could fax signatures. Many kids instead just lied about their age to participate, in the years that I ran the online forum only 2 people ever sent in forms.

Recently I sold the website and the new owner moved it to Europe.

It ends up promoting kids lying about their birthdates on a regular basis. There's actually no incentive to tell the truth.

"Lie about your age or get screwed anyway."

This also applies to the over-18ers. It's excess effort to put in a real dob.