Gutsy flying, hovering right above law enforcement like that, as we're not supposed to fly over such situations or in such conditions, to my understanding. Although I wouldn't do that myself due to the FAA regs, I personally have no problems with it and believe drones COULD be quite beneficial to society, given a fair chance. Being at the right place at the right time, drones could easily and subtly capture vital info on the bad guys who are out there, as well as either vindicate the innocent or help prosecute the guilty, regardless of what side of the law they are on.
Anything that happens on the public streets is fair game to film, photograph, or record. And just how many civil rights violations and crimes have been captured by casual passerby using their phones? An out of control, out-of-line officer or a dangerous law-breaking dude could be uniquely captured using the vantage points drones afford flyers, who would still be out of the way of the action. Only seems like a fair and sensible thing to be able to do as long as no one is in jeopardy of the drone. Ah, to live in a perfect, fair world that just made common sense.