Publishers can always restrict the banner types and categories which will display on their websites from the OpenX Market.

In Creative type Restrictions you can specify the banner type that you don’t want to display in your website. In content Attribute Restrictions you can restrict the banners by content attribute.

In the Ad Category Restrictions, you can specify the category which you do not want to display. For example, you could check "Adult", "Gambling", "Tobacco and Smoking", etc., and this should prevent all of these types of banners from displaying.