Spokesmen for public agencies are accustomed to difficult people, but a conspiracy theory zealot pushed Steve Snyder’s patience to the limit when he was a spokesman at Denver International Airport (DIA). Perhaps Snyder was weary of responding to rumors that DIA’s six runways form a swastika, or that there was an underground chamber built to hold a concentration camp, when he received an E-mail in 2003 from Greg Ericson of the “Free Press International” website.