martinibuster - 9:22 pm on Sep 23, 2011 (gmt 0)
This is an opt-in program. If you don't opt-in then you won't see the gambling ads.
Here is the corresponding AdSense link [google.com] about the Opt-In Gambling ads.
•Gambling: Includes online gambling and location-based gambling. Gambling ads will only serve in regions permitted by law. In addition, when you opt in, only visitors from your country will see gambling ads, and they’ll only see the types of gambling ads permitted by law.
These gambling-related categories are already allowed on the Google Display Network except where disallowed by law:
◦Offline gambling accessories
These gambling-related categories will potentially be allowed to run on your site when you opt in, depending on your country and the country in which the end-user is viewing your pages:
◦Online casino games
◦Tips, odds, and handicapping