I live in South Central Montana. The Wolves are everywhere, far out onto the prairies and far from the "Wilderness". I don't think the wolves have ate 50000 head of livestock but combined with the coyote this might be close.
They have decimated the the elk in Yellowstone (Park Service tells us its the bears). Massive reduction in the north herd. They have drastically changed elk hunting outside the park by disturbing the habits of game animals.
Wolves in the environment make it impossible to manage wildlife. It is estimated that they kill 10000 moose in AK every year that they do not even bite or eat. The moose are chased from their chosen winter range and winter kill.
Since the wolves we now see road killed elk in the Yellowstone River Valley as far down as Columbus (that I have personally seen) something previously unknown to me since moving here in the mid-1970s
Wolfs kill stuff. They even kill animals they do not eat. I believe the bears in Yellowstone are doing better because they are eating wolf kills. The Gbears have spread out too and places I used to hunt that were pretty much Gbear free now have this pest. Some of which are "problem" bears. People who live in places where they have such things know what this means. It means it should be shot on sight. But now they are radio collared so its risky unless they actively try to eat you.

The fun part is for years the experts told us that wolves did not eat people. All "anecdotal" historical evidence to the contrary not withstanding. But then they killed and ate a man in Canada a year or so ago. OOPS. Maybe Daniel Boone, various settlers and a host of American Natives were right after all...

My wife and I used to help and elderly lady with her chores, goats, chickens and sheep. She live her entire live in the west and her father had been a "wolfer". When the introduction started I asked Geraldine what she thought of it. She looked and me and said "Wait till peoples kids start disappearing". All she said. She was not known to ramble on much anyway. Born in a tent in Oklahoma circa 1900-1911.
I saw this as an anti-hunting move from the start, the setting up of the "Wilderness areas" was a similar move to force people out of their own national forest and it was worked pretty well.
There are a LOT of delusional types who feel that the wolf eating something alive is somehow better than my shooting something and having it die in seconds so I can eat it. They seem to think that I was dropped here from some other planet and should be prevented from "contaminating" wild areas by my presence.
Unfortunately the world is more delusional that sane, especially when it comes to personal freedom or self-sufficiency. Unlike our poster from the UK I never have to buy meat. My rifle furnishes more that I can eat and I give the excess to my kids or the food bank. Thus the wolf reintroduction impacts more than the livestock grower. It destroys game management. It could eventually force me to buy beef. It will result in less hunting opportunities which I believe was at least part of reason they introduced the pests in the first place.
The more radical "sects" of the environmental movement want the Rocky Mountain Wilderness and Parks all "linked" for free travel of the furry woodland creatures. They was corridors from where I live to the Black Hills of South Dakota. Never mind the private land owner and peoples houses.
You think this is "conspiracy, black helicopter, wacko" ranting you have not been paying attention. The Nat Geo channel just ran a show (from its description) on the idea of tying all the Rocky Mountain Parks together from far north to south.
I get a little "put out" since I happen to live in a proposed "wildlife corridor".

This is all coming to the east as well. So watch for wolves in PA and VA. If you have the opportunity you better start fighting it now.

Dan