What is Craigslist thinking? That question is being asked after the popular classified ad site closed its adult services section on Friday. In its place, they slapped a "censored" banner. More than a dozen state attorneys general and advocacy groups have pressured the Internet company to close the section down, arguing it promotes prostitution. Craigslist has stayed silent on its latest move. NPR's Robert Siegel talks to James Temple, technology reporter for the San Francisco Chronicle, about what it might mean.