This thread is important, although saddening, and sickening to many (including me). These are considered "cultural" practices in many places, which is hard for others of different cultural backgrounds to relate to, understandably.
Driving cultural change is a big job, but we must continue to illustrate that this is little more than basic human nature (we can do better than basic nowadays, I think), with little real cultural basis, in my opinion. It is reducing the natural resources the whole biological world depends upon, not just the human species.
In the 21st century it is simply counter productive for these communities to reduce their natural and
economical resources ($s seem most important to many folk), these places and hunting practices are reducing their capacity to produce food and develop econmoically (survive).
They are making themselves, and the rest of the world a poorer place for the purposes of mostly male bravado (that's the basic human bit).
It is a shame, and a selfish and increasingly ancient attitude that this kind of slaughter is considered acceptable.
It isn't just restricted to the countries mentioned, it occurs in other places including some areas of rural Australia and other more "developed" countries, often in low socio-economic places where education is limited.
Often, leading by good example is the best one can do (that is what this thread is doing, I hope). There is always lobbying governments and signing petitions too).
Kind regards, and heads up, we're all making a difference by illustrating how these activities are selfish and reducing the ability of humans to live sustainably.
Be positive! It will change