A lot of idiots will just shoot at movement and then look to see what they shot at. I almost always wear orange for the walk in and walk out, just a ball cap. Oh, and my sitting pad is orange and clipped to the back of my pack.
Also a story, a couple of years ago a friend and I were hunting somewhere up on Palomar. We had settled into a natural hide when we saw another hunter come into the area. We waved to him to let him know where we were and he brought his rife up and pointed it at us! I think he might have taken a shot but fortunately I carry an orange bandana in my pocket (for this very reason) and waved it at him. No shots were fired but to this day I have no idea what that f-ing idiot was thinking.