How to activate a stolen iphone?

I purchased a iphone off somebody in the street for only 85 bucks. (I'm not shure if it is the 4s or just the 4). When I purchased it I already knew it had a bad ESN but still bought it because if I couldn't find a way to turn it on I was just gonna use it as a ipod and camera. All I want to know is if their is anyway that I can activeate the phone?

Think about this. If it is indeed stolen, and you somehow activate it, and the owner has reported it stolen, when you enter the network, guess who will be waiting for you.