Coppa
 

Is it possible to make it so that if a user is under 13, they must enter their parents eMail and their parents must click a link to activate their account?

Umm..tell them to..? Or make it a rule. Be hard to monitor though.

No, like, make it mandotory.

If members can type in their own email addresses...?

How are you going to know if the email addy is a parents or just another one of their own?

We won't. But a fake one would result in an immdate ban.

...how would you know its fake?

IDK.. On your site, how do you know if someone is lying about their age?

Simple:
No one under 13 is allowed.
If they are under 13, then they have their parents birthday and email.
As most of them members here on members on other sites I go, we can usually tell.

We dont have a huge issue with people lying about their age. With our near 300 members, we only had like..2 or 3 that lied.

I think we're straying away from the OP's question. :)

You would need a modification to implement a new set of email fields.