From upscale waterfront neighborhoods to malls, parks and packed restaurants, viral “teen takeovers” are erupting across the country with police responding to fights, robberies, vandalism and gunfire as massive crowds of juveniles overwhelm public spaces. In recent months, chaotic scenes have unfolded from Washington, D.C.’s Navy Yard to a Georgia beach pier, a downtown Detroit entertainment district, a Wisconsin shopping mall and a packed Chipotle restaurant where screaming teens hurled chairs