and then click the little question mark next to the section, "Insensitive (bigotry, hate, ridicule, stereotyping) toward certain groups of people," you'll see that it reads:
When discussing certain topics -- especially those relating to each human being's unique personal identity -- DU members have a responsibility to show greater understanding and sensitivity. To help promote a welcoming atmosphere for all of our members, the moderators are empowered to remove any post that they deem insensitive. Such topics include, but are not limited to: race or ethnicity, gender, sexual orientation or gender identity, religious believers or non-believers, Jews or Judaism, Muslims or Islam, geographic region or place of origin, disability (mental or physical), weight or other physical characteristics, or age. Moderators may also remove any post using insensitive terminology (eg: 'cocksucker,' 'pink tutu,' 'bitch,' 'whore,' 'retard,' etc.).
Hopefully that will give you some guidance.