Use whatever camera you already have. Bring a friend who can watch your back. Preferably a big, hairy, ugly friend with tattoos and scars and missing teeth. Even in the hood there are few who will try to steal your camera. They would rather take your wallet for the cash than to get a camera that they have to sell to get money. It is more likely that they will chase you to beat the pulp out of you for taking their picture -- either because they are engaged in some sort of illegal activity, or are wanted by the law, or are just shy... or just becuase they know "you aren't from there". Wear good shoes that will allow you to run fast. Don't drive a nice car either and park it on the streets in a ghetto.