If you can bring pepper spray to NYC, you can carry it safely, bacause as opose to firearms, OC cans have no serial number and can not be traced. If you do have to use one, just drop it right away and it can no be connected to you, unless your fingerprints happen to be in NCRD, AND you caused serious enough damage to the attacker thhat prompted him to seek medical treatment and NYC police have really nothinh better to do then investigate OC can use through federal channels (not even remote chance they will do that unless you killed somebody with your spray).