[7days]

If they are armed, and outnumber you, I don't know if non-heavy injury is an actual possibility unless you have a lot (and I mean a lot) of training. I would assume in a situation like that you would be fighting for your survival. Non-injurious methods are not really an option. I would argue that if your opponents are not interested in playing fair there is no reason to limit yourself in such a way. Now if you are into martial arts training to the point that it becomes more about philosophy than self defense, I would assume you could take them down non-violently. But for most people, even with a little training, facing several armed assailants is not a philisophical exercise but a fight for your life scenario.

Edit: Besides, an overwhelming show of force on one person may help you to avoid having to fight( and possibly injure) all of them.

2nd Edit: I just reread the start of the thread and see that I missed the point. However, I stand by my statement. If several armed opponents jump you, and you fight back and they sue, I'd hope a good lawyer would be able to get you off faster than you could say "self-defense".