This reminds me of the story of the guy who got away from his mugger by bashing his head with an iPod Mini.
I wonder about the possible damage inflicted to said gadgets (try explaining that to the warranty people), as well as, obviously, how much harm they could do to people. Laptops may be getting smaller, but all that aluminum packs a punch.
I've got pepper spray in my handbag just in case, but I won't lie; I've thought about how much smashing someone on the noggin with my iPhone would hurt. Let's call it last-resort self-defense. What do you think of this phenomena?