age gate

I would love to get some advice on this one. This is on that gray line of duplicating functionality, so I'm not sure how to proceed.

I have an ESRB compliance module. Basically, any site that has mature content and works with ESRB will need that installed. The module allows admin to set the minimum age requirements to register on the site, as well as to enter the site. Then the module will take over, and create an age gate that the user has to fill out before entering the site. The cookies are set per ESRB guidelines.