There is at least one cab driver who travels around the Upper East Side of Manhattan and dumps bird feed on the sidewalks. This attracts and feeds hundreds of birds, rats, etc. I've witnessed a specific one with tag 6H92 who stops in unsafe locations and dumps 40 pound bags of feed on the sidewalk. The TLC is unable to take action beyond issuing small fines for unsafe driving. With enough signatures, we can pressure local government to make this behavior less legal.