I as a foreign citizen do take the morality of intelligence actions and foreign politics quite seriously.
As far as my view(which is rather ignorant, hence why I would like to know and discuss more) is concerned, I'd think that some form of international agreement on spying/intelligence gathering should be formed and enforced. For example the NSA hacking to Hong Kong machines should be a criminal offense, and the same should go the other way around. This stuff should really go through the legal system and people should be punished accordingly. Just because it is some form of governmental intelligence agency shouldn't ever put it above the law.
As we have seen with the case of NSA, it is used for domestic spying too and nobody really knows for what else.
Your proposed system requires a world government with real powers of enforcement. It is not in the interests of the USA, China, Russia, India, Pakistan or France to do this. Absent wholehearted cooperation by them this cannot happen. If you got all of them on board you might be able to get the rest of the world on board.
In the world we live in, and will continue living in until there is a world government there are bad people everywhere and some of them work for other governments, who can and will protect them. This doesn't even touch on the fact that your/my/any human values are not universal, and universal law is about universal enforcement. Whoever wins the last war gets to tell everyone what to do. That's what world government is.
As far as my view(which is rather ignorant, hence why I would like to know and discuss more) is concerned, I'd think that some form of international agreement on spying/intelligence gathering should be formed and enforced. For example the NSA hacking to Hong Kong machines should be a criminal offense, and the same should go the other way around. This stuff should really go through the legal system and people should be punished accordingly. Just because it is some form of governmental intelligence agency shouldn't ever put it above the law.
As we have seen with the case of NSA, it is used for domestic spying too and nobody really knows for what else.