PETA Among Groups Spied on by Maryland State Police

According to the Washington Post, PETA was one of many groups the Maryland State Police considered a security threat.

PETA was labeled a "security threat group" in April 2005, and by July police were looking into a tip that the group had learned about a failing chicken farm in Kent County and planned on "protesting or stealing the chickens." A "very casually dressed" undercover trooper attended a speech by PETA's president that month and waited afterward to see whether anyone talked about chickens. Nobody did.

Very casually dressed must mean cotton dockers and an off white shirt.