Script to disable adsense

Hello,

Does anyone know of a script to disable Adsense when the usergroup permissions of "unregistered users/not logged in" are enacted so that guest can only view the arcade but not play.

This is what I have so far, but it is wrong, thank you.

(THIS_SCRIPT == 'arcade') AND $_REQUEST['guest'] == ''}
)">

This is part of a larger script designed to prevent adsense from showing up in all the places where it is not supposed to.