Back in August, Google gave AdSense publishers more control over what ads appear on their sites by launching an upgrading the category filtering feature and extending the feature's beta to the US and the UK.
So in essence, if you don't want certain kinds of sites showing up in ads on your site, you could block them. Google shows how the different ad categories contribute to your income, so you can take that into consideration.
Today Google announced that it will be providing users with more ad filtering options. Soon, the option for 3 more filter categories will be added for a total of 8 different categories. These will be coming in the next few weeks.
"To get started with category filtering, sign in to AdSense and visit the Ad Review Center, located under the AdSense Setup tab," says Google's Arlene Lee. "You can choose from the listed categories, which include religion, politics, and dating, and your selections will be applied to ads in English no matter how they're targeted."
Google says its continuing to work on additional filtering capabilities as well, but does not get into specifics. They are of course encouraging feedback.