Yes? That's the point of my comment? I'm confused about what you're saying. I'm trying to answer your question "And do that every time a hack occurs?". The answer is yes, it's completely feasible and within the powers of a government or inter-government treaty organization to do this every time a hack occurs, because they already do. I'm not trying to say that such a system is good, just that it's possible. There is nothing "special" about blockchains that exempts them from normal government regulation.