It can get dangerous at times. Pick your entry point carefully.
Sure it’s rude, but many otherwise very pleasant people become rude drivers when they learn the rule of the New York City jungle. If I would be as couteous as I am used to being I would never park, nor ever pull out of a parking place. I would unload my boxes and luggage five blocks away from my destination and carry them one by one, Pachos Pachos.
I wonder why the road and parking crisis is never dealt with by politicians and campaigns.