Re: You want fries with that?
"So some guys took it on themselves to take over drive through ops using their own radios..."
I know of a McDonald's crew that inverted that trope.
McD headsets also allow staff to communicate with each other. I know of one McD employee whose wife liked to sit in the parking lot and listen to the chatter on her scanner. The staff caught on, but didn't let on. I believe one of their tactics was to discuss how "Ronald" was flirting with attractive customers (followed by peeking out the windows at the car when he left for break or quitting time).