Silly. Wolves are apex predators and play a key role in balancing the carrying capacity of the environment, like all other apex predators.
Human are, of course, apex+ predators, and have the ability to displace apex predators whenever they choose. Doesn’t make that choice a wise one.
I recommend the article at the link. It’s from a loonng presentation by Michael Chrichton. The whole thing is good, but he has a section on the (mis)-management of Yellowstone about halfway down, a key component of which was very early wiping out the wolves.
http://www.independent.org/events/transcript.asp?id=111
Here's a link to site that is more pertinent, and you don't have to sift through a bunch of crap to find the information you're looking for:
Scouts Out! Cavalry Ho!