Well, I can't talk about these situations, since I wasn't there and thus don't know what the shooters were thinking.

I can talk about myself, however. I have a healthy respect for guns and the things they can and can't do. I also am aware of how poor light, perspective, and excitement can make things look different. I was taught to never point the gun unless I was sure of the target (that's why I carry binoculars -- so I don't have to use the scope for that), and I was taught to never pull the trigger unless I wanted to kill whatever I was aiming at, whether it be deer, turkey, hog, or human. And just my own moral code prevents me ever doing the last one, which is why I don't have and carry a handgun. So in that sense, I don't understand why these guys got shot.

In another sense, though, I can see why. The brain plays tricks on us, making us see what we want to see (and that's true in so many situations, not just hunting), and then talks us into doing things we shouldn't.

So while I don't quite know what happened, I do know that paying attention to safety is literally a life-or-death situation.