[AMF]

It's simple.

Make the penalty for an accidental discharge immediate termination and loss of flight status.

If that doesn't work, make the penalty for accidental discharge the supervisor's job and a fine.

In the military, the only way to prevent accidental discharges is to punish that person's supervisor. That way it's almost assured that it will get checked and double checked and the individual will receive more training than they can stand.

Don't punish the people who follow the rules. Punish the idiot who doesn't and if that's not enough, punish his boss.