The funny thing is, I remember when the police were campaigning against "have a go heroes" to prevent injury. Here's an article from a decade ago:

http://www.independent.co.uk/news/educa ... 78245.html

"The lionising soon sloped off when it became clear that many of the vigilantes were ending up in the local A&E unit, and some finished up in the morgue. . . advice from various police forces was clear: don't get involved, call a police officer."

I'm not very good in physical combat, or even with a blade. I guess I'd better start carrying a firearm to help out the government.