Security ... think about it!
OK, the last fellow lost his fight, and yes, he's not much of an argument for the usefulness of martial arts training in staying out of trouble. However, the more interesting observation is that, of the cases I dug up, 60 percent of those who used martial arts to smack down an attacker (even if only temporarily) were blind or elderly. Sure, maybe only the man-bites-dog cases find their way into news accounts. But it's tempting to say blind and/or elderly + martial arts training = decent chance of kicked bad-guy ass.