The situation you are referring to is when you where sitting on top of office building in Athira. One way up and that one way being completely defenceless. I killed you from factory 300m away. What did you really expect me to do? Climb up and let you kill me so that you can get some CQC...
When I was on with @Ponty the other day, the moon was 100% there and it was brighter at night time but at around 12am in game you could slowly see it disappearing and then it was pitch black....
Your Arma 3 profile may be set to read only in your documents if you have changed your FOV and will default back to what ever they where when it was set.