Alice Bradley Sheldon, who wrote SF as James Tiptree Jr,  among other pseudonyms, also worked for the CIA, along with her husband. 

One of their assigned tasks was to infiltrate and monitor Right Wing Nut, Racist and White Pride organisations. She wrote that the internet made that work much simpler, more effective, and safer, since they seem oblivious about being infiltrated and monitored by government snoops, and you didn't have to show up in person to meet with them.