Sometimes the lion populations outnumber the prey and the hunt them for culling purposes. However, I find no joy in hunting a lion and killing it. Its an amazing beast to see, I have seen some African lions in the wild and its truly a sight to behold. However, in some areas lions are overpopulated and killing the livestock and they have to thin out them. This is a result of the destruction of the natural ecosystem, where large sets of natural predators were there to keep other populations in check.
The worst form of destruction is poaching, they ought to hang every poacher as they have caused so much destruction to our environment and wildlife.