Denver (AP) Travelers using Denver International Airport's free wi-fi service can't visit internet sites that airport officials consider provocative.
The internet filter is blocking Vanity Fair magazine's web site, the hipster site boingboing.net, and others.
Airport spokesman Chuck Cannon says officials decided to block potentially racy sites when the airport made its wireless internet service free in November. Previously, there was a fee for using it.
Cannon says the airport would rather weather infrequent complaints about access than handle angry parents whose children might see pornography.
Critics say the airport is using the same technology used by repressive regimes in Sudan and Kuwait.