I have know a few people who worked for defense contractors that refused to work on a project that would ultimately kill people, even the enemy. They kept their jobs, but they never felt right being there. Could you justify making a device meant to kill?
This thought comes in the wake of learning of the U.S. military's new networked Ground Fire Acquisition System (GFAS). Mounted on U.S. Army Longbow Apache helicopters, the system detect muzzle flashed and gives the pilot, and via the net-centric battlefield information system to the surrounding ground forces and command centers the position of the shooter. The GFAS has a 120 degree field of view and works in any light conditions using its infrared cameras. It gives the pilot immediate results. A single trigger using the Target Acquisition Designation Sight/Pilot Night Vision Sensors lets the pilot deal with the muzzle flash as he or she sees fit. A similar system is already being used that senses acoustics from weapon fire. This system gets the position of the shooter nearly immediate compared to the long delay of sound. Like a lightning strike seen, and heard 5 seconds later.
Looks like the future will be difficult for the ill-armed irregulars seen in today's battles.