The other thing a 3D Maglight is good for is as a dog bite-stick. I learned this technique at a Klinghoffer session: you hold a stick (or other rigid thing about 14" long) straight out to a charging/attacking dog. The dog instinctively bites at the part of you closest to it (which it mistakes the stick for) and gets a nasty surprise when it bites the stick...and further shock when you don't react in pain.

It's a gutsy maneuver...I'm not sure if I have the canjones to pull it off, but I've seen demos and trust Klinghoffer's research.

Aluminum batons and anything defined as a weapon are likely illegal to carry/carry concealed in L.A. You'd be surprised at the list of things that are illegal to be caught with. Even a baseball bat can get you in trouble unless you have the rest of the equipment to go with it.