Ad-Sharing Include only feature?

I would love to see ad-sharing plugin allows admin to include only a few blog that admin wants to share/show adsense ads, and admin can exclude all other blogs meaning admin's adsense ads won't be showing on all blogs. This way admin can be sure which blog is showing the adsense ads, and to weed out the bad blogs that may irritate Google's TOS. Though when admin is not sharing ads with whatever blogs, the members who run those blogs should not be able to enter adsense code at all -- since no adsense ad will be showing on their blogs anyway.