It wouldn't by a long-shot. They are about the size of a silver dollar when they hatch and the yolk sac should be absorbed within weeks. They typically will not eat until the yolk is gone.
As to the O.P.'s question on damage, they aren't really dangerous at all until they pass six inches. A ten inch Common Snapper still wouldn't take a finger off, but it could definitely hurt you.
I work in Times Square. I think I'll go "rescue" a tourist's wallet. Don't worry, I've got enough space in my pocket and I've got plans to upgrade my bank account in the future.