The Wack Pack is a group of mentally disabled people who constantly appear on the Howard Stern radio show, either for interviews or for games. It's exploitative, but I can't help but find it mor funny than cruel (in most cases) to hear them answer some questions and talk about their lives. Is it wrong for me to enjoy it?
Here's a clip of some of the members. I think that there are at least 4 more members, but there could be more that I haven't heard about.