Ok well there is another side to it:
Demonstrators and other professionals have to operate in a safe manner, under OH&S there may be an argument for it, the risk minimization for a professional demonstrating such animals would definitely reduce the insurance bill and liability, if the procedure was legal in Australia, however as the operation is of no medical benefit to the animal, it is a violation of the Veterinary Practices Act, thus cannot be done.
Demonstrators also can ensure that all the staff are appropriately trained to work with venomous snakes, like any other dangerous jobs you need to ensure your staff are adequately trained to perform the tasks they are set to reduce the risk of harm. Working at heights, working in confined spaces etc all have risks associated, hence a person must be trained to work in them. So risk minimization in the case of demonstrators is to ensure that all staff working with venomous snakes have received the most appropriate training, not the modification of the animals that they wish to demonstrate.
So in Australia there is no need to have this procedure done on a snake, the other issues are that people may start to treat the snakes in a different manner, showing it in a manner which gives others a false perception of the snake, people are often guided by what they see, not what they hear...."don't do this at home kids..."
In terms of private keeping, I see no need for it at all, learn to keep the animals you own without having to modify the animal!