If indeed these drones are using Dirtboxes and are indiscriminately tracking people based on cell phone signatures, then I would posit that the combination of [1] and [2], and ongoing issues like [3], make what law enforcement is doing Baltimore disgustingly illegal and oppressive. Targeted and specific aerial imagery and inspection is a totally different ballpark than what these drones are doing.

[1] https://en.wikipedia.org/wiki/Kyllo_v._United_States

[2] https://en.wikipedia.org/wiki/United_States_v._Jones_(2012)#...

[3] http://motherboard.vice.com/read/court-limits-police-stingra...