I don't know what your point is, GP's comment already mentions a case where authority can intrude on individual rights: warrants, and there are many additional

I don't know what your point is, GP's comment already mentions a case where authority can intrude on individual rights: warrants, and there are many additional exceptions. The point of this system is not to make individuals untouchable, its to lift the authority to intrude on personal liberties out of the hands of individual beat cops and into a well-defined system and public observable record through the courts.