Recent terrorist attacks of soft targets in the US and EU indicate a potential increase in these kinds of attacks in the future. In the US, it is not unlikely that one or more citizens with a gun might be on the scene and seek to take down the shooters or disrupt the attack. Any thoughts on how one might identify oneself to law enforcement (i.e., second responders) in such a situation? Being an old fat white guy should be an unambiguous clue, but is there anything one could use to identify oneself as either "not the active shooter/terrorist" or one of the good guys? If one had a go bag or man purse on you or in the car, it would be possible to carry something small and light weight. Here are some things that come to mind: A high visibility mesh vest like those worn by joggers and road construction/utility workers A hat of some type that may be high viz and/or marked in a way to distinguish one from a terrorist (e.g., NRA, a gun mfg logo, municipality, etc.) An ID hung around the neck or on an armband -- the nature of the ID doesn't really matter (perhaps one's CHL), what's important is that shooters/terrorists don't display IDs It seems that the goal here is not to authenticate as law enforcement, but to strongly signal "not a terrorist" causing LEO to do something other than shoot you right off the bat. Thoughts?