A lot of people are fairly quick on the trigger and work under the assumption that the only reason to aim a gun at something is to shoot that something. The old "tried by 12/carried by 6" argument comes into play when you are being targeted by a real firearm or what appears to most reasonable people to be a firearm. I have successfully refrained from shooting at the several people who have scoped me with their rifle scopes but did have my safety off once(some trespassing jerk continued to scope me with his rifle scope from about 35 yards even after I made my humanness clearly known by sight and sound while hunting on my land). What you would do and what someone else would do may be two quite different things. I treasure my life enough not to give someone else a fairly good reason to do me harm.
A reflection off a single lens does not always mean someone is aiming a rifle at you.
