The only part that is off issue is that it was lured out. If it was not lured out it would have been "fine". As pointed out there are sanctioned hunts for them which help raise funds for the parks.
This doesnt sound like a sanctioned hunt. He bribed some guards to let them kill a lion. Then they did the most cowardly thing possible. Baited it with a dead animal. This pussy didnt even have the balls to sit in the bush for hours or days stalking his kill.