Well, most cities try to refrain from doing the PIT when there's a lot of cars parked on the street or there's a lot of buildings like in NYC or there's a lot of people, again, like in NYC, LOL. I think most agencies do it when there's the least collateral damage to be done. (Like civilians' cars being hit from the PIT and etc. I know if someone was that greedy for money they could file a lawsuit.)