RE: Should I have told him off?
You don't post whether shooting from a vehicle is legal where you're hunting, or whether it is legal for handicap (maybe he is).
It is reasons exactly like these that I keep my cell phone camera (at a min) and usually my regular digital camera (w/ video) with me nearly all the time.
Sorry you didn't fill a "freezer tag", but if it was meat you were looking for, you did say some meat had walked by, right? I just guess the meat that did walk by was the wrong cut?
We usually fill the freezer with our first opportunities and get that requirement off the list.