My suggestion is quite simple, Recently a world summit in Moscow announced that Tigers will go extinct in the year 2022 if nothing is done to help them as a species. Many countries are working toward protecting habitat and eliminate poaching. Blizzard has a wide influence on a generation that could be tapped into in order to help this situation.
If blizzard were to create a sort of quest in Diablo III that was related to the issue of protecting a tiger population that is dieing out in some remote jungle area of the game, it would be a subtle and possibly proactive way to shift peoples thinking toward protecting these beautiful and regal animals. It may be a stretch and completely different way to approach it, however, I think Blizzard could gain a bit of positive Public Relations by doing this small thing.
People are often affected by the games they play, the books they read and the shows they watch. If in Diablo III, the programmers were able to create a quest that has people protect and preserve a dieing species of tigers in some remote jungle section of the world, I believe people's thoughts on the subject could be altered even if only subconsciously if not directly.
Thank you for taking the time to read this and I hope someone at least considers the option.