A favorite civil weapon of mine is a bike chain (thick aircraft cable) with a padlock attached to one side. The thing is legal everrywhere and can be used with lethal effect. The aircraft cable coils itself tight by itself and if you use a good lock you can't dammage the lock.
You can get them on airplanes too.

If it is legal in your country they've come out with an improved tazer. It fires a "rubideium"(SP!) laser at the person and the electricty follows the laser's path to the target (they were tested in Tokyo where they guided lightning strikes along them). The electricity is freq modulated to boot making it about 10x more powerful then a standard tazer. The Prototype had a range of about 4ft (which is still out of most close combat range). Unlike the air taser it doesn't use barbs to fire into the person (making it a one shot deal). There is also a lesser version that was just released that sprays a conductive spray at they target (but the spray runs out). The new version can taser multiple people for something like 30 minutes straight due to the freq mod that uses far less current. Nasty crowd control applications because it only takes 1 second to put someone out for 15-20 minutes unlike the taser that take about 10 seconds to do the same thing.

Isn't the future grand?

-NIM