[Rick V]

My dad has more guns than I even know about and for the most part all is well and since he lives alone, there isn't much danger of someone else getting hurt but................
My Dad is the oldest gun carrying deputy in the state of Va, he is deadly with any gun he gets his hands on, just a natural shot, and being a cop his gun discipline, sucks. He is very good about not touching a trigger but the muzzle direction issue is something I always get on him about. There have been several times I have actually put my hands on his wrist and moved his arm, then proceed to tell him to straighten up.
Sure it makes him mad, and sure I get the I am a cop and I am trained and I know what I am doing lecture to which I tell him to get some more training and stop pointing a gun in the wrong direction. He realizes I am right and he makes an effort to correct it, but always falls back into this bad habit.
Some subjects you just have to speak your mind and not worry about making someone mad. At the end of the day they will realize you are right and get over it. If they don't then they have just proved your point and you can bring that to their attention.
Tough love is the only way to handle this situation.