Looks like NYC's biker groups have evolved considerably since I last encountered them years ago, and not in a good direction.
This kind of behavior is breaking out all around the country, and is going to be met with violence. If the po po want to keep harassing innocent civilians and shooting dogs while gangland crap like this gets worse, two things are going to happen. 1) Vigilante groups will form spontaneously among the citizens, and 2) Police are going to be considered part of “The Enemy” as the country polarizes into people who are “With us” or “Against us.”