I've been asked by the head of one of my schools to ban all PS3/Xbox360 games related websites!!!

This as I have found out there are lots of different sites related to eg: Black Ops, Assasisins Creed.

Does anyone know if there are any Global "blacklists" available that I can use, or is it a matter of searching for the required item, then adding ALL sites that pop up!

Also how easy is it to change the message that Cachepilot throws up when a "banned" site has been input?