In my opinion, both were probably unjustified in RL - and consequences would have followed.
In RL, Rachel shooting Trask would be considered a 'good' kill - she shot an armed man who was a clear threat to a civilian and there were witnesses to confirm that. While there would have been an investigation during which she probably would have been put on forced leave, chances are very good the Feds would have disavowed Trask and she would have been cleared.
In Moyne's case, shooting unarmed people is frowned upon. From personal experience, many years ago my family was being threatened by a stalker. The honest-to-god advice from the local sheriff was 'If you shoot him, make sure we find a knife on the body.'
