That was my first thought. Someone may have conditioned these wolves to expect food from cars and humans.
I was on Assateague once, when a bunch of the feral horses surrounded our car, stuck their heads in the windows, sniffing us out. We had to just sit there until they realized there was no food forthcoming, and moved away.
Only the government could take an iconic, free, powerful being and turn it into a lazy leach and a beggar.