Anywhere within a city? Larger populations have been proven to have more instances of crime for various reasons.

Further, if you're wearing a massive, expensive pair of goggles that simultaneously broadcast your wealth and block your vision, you're gonna get mugged. It's just a matter of time.

Pickpockets have been a perennial concern on the DC Metro system. One of my coworkers had his iPod pulled out of his hand, resting on his stomach, while he was sitting with his eyes closed. Transit isn't somewhere I'd want to be blind to what was going on around me.