Well, I think I have a pretty good self defense tool. Took me a while and a couple of tries to get it right, but it meets my criteria. It had to be completely innocent looking--something an officer could see me with and think nothing of it. It had to be effective--capable of delivering an incapacitating or killing blow. Ideally, it should serve some other purpose than self defense.
I think I managed pretty well.
I bought 2 identical bandanas. I cut the corner off one of them and sewed that corner piece to the other bandana, effectively making a pocket. In the pocket is my big set of keys or a roll of quarters. If I swing the bandana with those quarters or keys in the pocket at an attacker's head, it'll ring his bell pretty good. Very similar to a sock with a roll of quarters in it, and just as effective. Only, the bandana should draw less suspicion if someone sees it than the sock, since a bandana belongs in your pocket more than a sock does. BTW, my keyeing is heavy, with heavy trinkets on the ring.
The bandana can also be used to draw my knife without anyone the wiser, simply by pulling the knife out of the same pocket as the bandana at the same time. Knife is opened beneath the bandana. A fake sneeze is a great excuse to pull the bandana and/or knife should your Spidey Sense start tingling. You simply hold the bandana and/or knife after that and you're armed and ready for whatever comes next, all without alerting Mr. Badactor that you're ready for him.
There are a ton of other uses for the bandana; tourniquet, bandage, dust mask, sweat mop, ect.. The pocket does not stop it from being used for anything a regular bandana can be used to do, even wiping your nose.
It's not sexy, but it can be pretty effective without alerting anyone you've got a weapon. It also shouldn't get you in trouble if an officer sees you with it. You can bring it right through security with no problem.
The key to this weapon is surprise. I would never threaten anyone with it as that would kill the element of surprise. I'd just whack the snot out of an attacker as fast and hard as I could, repeatedly, until he was no longer a threat. This weapon is not the "ultimate" weapon. If someone threatens you with a bat/club or a firearm, you're not going to like the outcome. However, when it comes to an effective weapon that doesn't look like a weapon, you could do worse.
I triple-stitched the pocket with that clear thread that looks similar to fishing line. It's strong enough to swing full-force without tearing.
The same thing can be done with a white handkerchief, or even a scarf, ladies.
In a pinch, you could drop something solid and heavy into the center of a regular bandana/handkerchief, grab the four corners, and swing away. This weapon hits like a slapjack, but doesn't look like one. If anyone is afraid of the legal consequences of altering a bandana, this alternative could still work for you, especially with an oversized bandana or handkerchief.
FYI, my bandana pattern has smiley faces and the word, 'peace,' all over it, just because I get a kick out of irony. Have a nice day. <img src="/images/boards/smilies/wink.gif" border="0" align="absmiddle">