I was having a discussion with an ex-police officer about various means and methods of personal defense. I explained that I will carry a telescopic baton in my car from time to time and that if necessary, I'd have it with me while riding my bike. He explained that having one in your car is acceptable and legal but that by having it while on a bike may get into the area of carrying a concealed weapon, although he wasn't completely positive. I do not have a CCW permit, I rarely feel the need for defense on the bike, but should I feel anything to the contrary, I'd rather have something than nothing and I found this news a little upsetting. How do U.S. laws pertain to personal self-defense and cycling? Is a bike considered a vehicle in this context, i.e. like a car - an extension of your home, where weaponry is permitted without a permit - or at that point are you a pedestrian concealing your weapon? Is this different from state to state?