Moon landing deniers are my favorite conspiracy theorists to make fun of, because it's clearly "political" in the sense that it involves something operated by the US government but not aligned with any extant political party or movement the way, say, 9/11 truthers are all within the anti-Bush umbrella. So you don't have to worry about easily offended people assuming your criticisms of the conspiracy theorists stem from a hatred of everyone at that end of the political spectrum. (I mentioned before the time someone I knew got pissed at South Park for lampooning the 9/11 truthers despite not being one herself, right?)