In Hempstead:
http://newyork.cbslocal.com/video/9803182-new-law-bans-extreme-backyard-bird-feeding/
Bird biologists and animal experts like to discourage wildbird waterfowl feeding due to unsanitary conditions created and avian addictions. Disease (avian flu, botulism from dense flocks) and human imprinting are some results
See this excellent link why. http://www.dec.ny.gov/animals/7001.html