As others have said we are not required to provide ID unless there is a cause. Stopping 2 people without stating why means no cause and they have the right to say no and it should end with ok have a nice day, but our rights are tested more and more. Some good news is its generally an easy case for a lawyer to pickup and win meaning they could get a payout from the city. The sad news is generally nothing will be done about the cops who abuse their job and cause the tax payers more money in lawsuits that should never happen.