Well, I can't get real specific on the coding end of it because I don't know how the general customer base is going to want to deal with this. My original thought for now is if the user enters an age of under 13 then the user account will not be created at all, and it will serve up a general "We Cannot Proceed" message, with the information stating that because the user is under 13 the account cannot be setup, please email whoever to get more information... This way, on initial setup of the program it will be compliant. For those that want to allow kids under 13 on their forums they could edit the general message to link to a form to get the proper consent for this kid to have an account, could ask for email address, etc. And then the admin could proceed from there on how they want to handle it.
---
Scream
<A HREF="http://www.wcsoft.net" target="_new">http://www.wcsoft.net</A>