From that website - a funny one about RPK switch:
"Some air crews witnessed a further step taken in the electronic gamesmanship: simulated SAM launches. "We used to joke about the Russian technician teaching the NVA and saying, "See that big formation right there on the scope? Well, watch this,' " says Bill Sparks, a former F-105 pilot. "He would hit the button, and the formation would look like the world's biggest bomb burst as everyone jettisoned their loads and went crazy looking for a launch. Kinda funny, really."
That is that switch on the I64V panel.
You can frighten the SR71 with it