SkidKid
The CRC involved in the exercise will ensure that all ATC units in the affected airspace are informed of the activity. In this way the civilians in the area should be made aware. If this fails to get the civilians out of the way, so to speak, then the formations with the lights out will be hgt capped or if it gets too busy will immediately go lights on. There has been recent CAA guidlines released concerning this very issue.