I think this might interfere with some research involving the gorillas. You cannot study their natural behaviors if you are assisting them. Not to say there isn't research teams looking to train gorillas, my point is that may not be THEIR focus. While they cannot control for poachers, they can control for them own interactions. Furthermore, not to slippery slope, but to what end do you believe they should be allowed to interfere? If, say, a diseased food source begins to decimate the group that could be prevented through cooking, should the researchers attempt to teach them how to cook the food source to kill the bacteria?