Many street photographers have upped their games since smartphones came on the scene. Particularly the iPhone 4S, with its superior camera and multitude of cool apps and add-ons.
But iPhoneographers and others who troll the streets texting, talking and accessing apps like Yelp and FourSquare to find the best local coffee or a freebie need to be aware. You're at high-risk of being mugged for what thieves deem far more valuable than the contents of your wallet. They want your iPhone.