The incessant pop-pop-pop of the fast-growing sport has brought on a nationwide scourge of unneighborly clashes, petitions, calls to the police and lawsuits, with no solution in sight.
It sounded like popcorn warming in a microwave: sporadic bursts that quickened, gradually, to an arrhythmic clatter.
“There it is,” Mary McKee said, staring out the front door of her home in Arlington, Va.