What do you carry when you can't carry a gun?
Haven't read everything, but thought I'd add what I usually have with me, whether I'm carrying or not.
Tactical Flashlight - Bright white light and can be used as a striking weapon
Folding Knife - Benchmade Griptillian, to be exact
Tactical pen - Cool looking pen, and striking weapon
If I'm flying...all I usually have is the light as the other objects are prohibited. However, as soon as I land, I get everything I can legally have out of my checked luggage and put it on.