Not a bunch of dickheads grabbing a random map, the attacks were on specific instruments that you have to know where they are, how to access them, and what to do with them (okay I guess "toss a burning rag in it" is enough for that one). And that was in towns / places that were across half of the country or something (I think there were attacks West of Paris, then halfway to the North, and one halfway to the South that was thwarted). So likely an inside job / from someone who has worked on those things before. Obviously the actual people who did it could be any random paid homeless guy, but the map was provided by someone who is or has worked on that system, that's the point.