But, apparently, some things do freak out some New Yorkers. And the walking undead, what with their hanging flesh and vibrant eye color that I haven't really seen explained in any literature yet, is definitely one of those things.
New Yorkers will ignore a lot of oddities walking down the streets of the city. You have to, because you encounter the weirdest things. Like a guy licking his shoe clean on the subway. Or people who like to poop in public. It happens.