Locking ads (so the owner can't edit them later).
I've got people placing ads on my site that border on spam. They're good ads, but they keep putting hyperlinks to their website in them. Whenever I remove the links, they go back in and add the links. Furthermore, with the ads that people post for free, I include some google adsense code in the middle of their ad and they keep editing this ad code out.
Is there a way I can "lock" certain ads to keep their owners from editing them?