PREDATORS -- In some cases, the Internet is incredibly predictable.
The Facebook caption says: "A little Wyoming justice by some folks that are fed up with wolves and the affect they are having on wildlife populations, livestock, and our way of life as hunters and Wyoming residents. The bunny huggers are having a conniption fit over this so let's show our support these guys."
Hunters can buy a hunting license and wolf tag and legally harvest a wolf under Wyoming law.
So while this photo is distasteful to some people, it doesn't imply anything illegal, just an attitude that's still pervasive.