I could REALLY destroy this argument, and I mean REALLY, but I'm not sure if I should bother. I grew up in Brooklyn, NYC, and muggings are a dime a dozen. Quite often, you know the guy mugging you, or one of his relatives, which is why muggers have short careers in my old stomping grounds.Meanwhile, if a dude is trying to rob you, you're gonna know he's trying to rob you.
I was mugged by a close friend of my cousin when I was 12, and I had been playing basketball with him a week or so before. Seemed cool. Thought we were buds.