Good on Penny, but it sounds like her attackers weren't typical of the kinds of guys I've encountered in other parts of the New World. Just tenkan wouldn't be enough to end most conflicts.
Aren't most muggers after an "easy target" who won't fight back? My roommate (who has NO martial art experience) escaped a potential mugging by walking right up to her would-be attacker's face and cussing him out.
There are plenty of near-misses that go on every day, and are not reported. We just hear about the more *serious* crimes that *did* happen.