And he didn't shoot either. I have spent considerable time in an environment where people were actively trying to kill me and I them. I am still not going to fire on a glass flash or seeing somebody scope me. I will try to join up with them and point out my displeasure however, and if it turned out to be a rig like the OP showed would probably admire it.
Go back to the mall and play mall ninja, you do not impress me in the least.