Well since the WWF was founded by European royalty (Prince Bernhard of the Netherlands) they would not mind so much if they shoot for trophy. If we ordinary people do that we are in big trouble.
This has nothing to do with the royal connections, but more to do with commonsense. Trophy hunters pay anywhere from $10,000 to $100,000 to hunt just a single wind animal. This much money can be used to employ a dozen forest guards in Africa, there by preventing the poaching of hundreds of animals every year.
And guess where the former Spanish King Juan Carlos went hunting? In Africa and he is still member of WWF. Our king at least hunts boar and other game (which are tame and fed by humans) but Juan Carlos did not mind shooting Elephants.