Soychemist writes "Walk into the Taser headquarters in Scottsdale, Arizona and it may seem like you are on an episode of Get Smart. The foyer is like a fortress, with giant steel doors and biometric identification systems. Inside, factory workers meticulously assemble the less-lethal weapons by hand and then put them through a battery of safety tests. In addition to making pistol-shaped devices, the company also produces the electronic equivalent of a claymore mine, which hurls dozens of electrified needles at the push of a button and electronic shotgun cartridges that deliver a powerful jolt."
Computers are unreliable, but humans are even more unreliable.
Any system which depends on human reliability is unreliable.