The rampage people are clearly crazy and I would hesitate to even predict how they would react to the site of your weapon. That second, much larger group... they will likely just walk away peacefully. You will pobably never even know what you avoided.
But.. But.. You want the criminal to pull a weapon on you so you can shoot him and be famous in the "Armed Citizen" page in the NRA magazines and then everyone will know how brave you are and all the chicks will dig you and the tires on your truck will get bigger and everything!!