4th of July Celebrations

Happy 4th!!  The City is gearing up for the major fireworks display that takes place on the Hudson River.  All the trees in the vicinity of 8th avenue and 12 street have 6 foot tall, 2×4 frames encasing them.  To prevent them from being broken by the crush?  Seems like overdone precautions.  But perhaps this is a case of not letting history repeat itself.  Not everyone gets to the beach, or has a house on Long Island so there are plenty of revilers left in town to cause a crush.