If ads taking a big area, then the threshold can be bigger. Like, if more that 50% of site has changed, then notify you. If ads showing a nudity or something,

If ads taking a big area, then the threshold can be bigger. Like, if more that 50% of site has changed, then notify you. If ads showing a nudity or something, then it's not possible to avoid it. However you just got me an idea! I can give user an ability to setup area of site which should be checked. Like, if the ads on the right side of page or something like that! Thank you!