Did a video for my daughter of the university she attends as a grad student. I had some initial apprehensions about flying the campus without first seeking permission. My spotter, a recently retired LEO, offered to liaise with campus security.
Turned out that the Campus had a no fly without expressed permission policy, in part because some yahoo football fan with a shiny new drone and no common sense decided to buzz the stadium and field while a home game was in play. Reckless endangerment arguments aside, colleges depend on revenues from sporting events which includes revenues from selling broadcast rights exclusively controlled by the university. Story goes that campus security followed the drone until it landed and then converged on the clueless operator.
So I can see, on one hand, why flying and filming at or near a highly populated event (like a national sporting league draft) would give LEOs tasked with event security cause for heartburn without fair warning. Factor in elements like ISIS/ISIL and their sympathizers who actively adapt consumer UAV's to deliver ED payloads, and getting a guest appearance from somebody's CT Unit comes as no surprise.
On the other hand, holding the filmmaker in custody for 14 hours (per the article) while someone in authority figured out how or whether to press charges (and for what) was just piss-poor contingency planning for the draft event. In the absence of permission, the filmmaker should have been released as soon as it was obvious that he posed no threat or told to fly elsewhere until after the event cleared.
We were cleared to fly and film but not before security and university management signed off, patrol and public relations were informed (all of which were professionally and expeditiously handled for us) and we could assure everyone that we were insured.
Moral of the story is football takes itself way too seriously.