This explanation is so uncharitable it crosses over into implausible. It's not "the easy part" to get random McDonald's employees to behave as extremely as this.
Well if McD have a policy of not allowing photography of their staff in their outlets then it's easy.
McD worker: "sorry sir you can't take pictures or video of our staff"
person with recording device: "I'm not taking any pictures this is a medical device"
worker: "it looks rather like a Google glass recording device; you were recording the servers at the counter just now weren't you, I'm afraid you'll have to leave"
person: "no I won't I'm not recording anything these are just my glasses, see I have a doctor's note" [passes note carefully made to look fake but actually having real content]
worker: "sorry, please leave" [attempts to remove what he believes to be Google glass device as the person moves towards him aggressively]
It probably didn't go down like that but why is it such a stretch to believe it did?
