In this essay I argue the following:
Brain emulation requires enormous computing power; enormous computing power requires further progression of Moore’s law; further Moore’s law relies on large-scale production of cheap processors in ever more-advanced chip fabs; cutting-edge chip fabs are both expensive and vulnerable to state actors (but not non-state actors such as terrorists). Therefore: the advent of brain emulation can be delayed by global regulation of chip fabs.
Full essay: http://www.gwern.net/Slowing%20Moore%27s%20Law
Well, in the US, they do have the National Security Agency to deal with security issues. However, shutting down Moore's law seems unlikely to be one of their priorities. That would cede the initiative to other parties - which seems likely to lead to other, more immediate problems.