That's what happens.
A gun in the hand of a police officer is used responsibly, to protect others, while in the hand of a crook it becomes a tool to be used often and for self gain.
The Patriot Act as used by the Bush Administration was a cover for "exceptions" - not a tool to be used to dig up dirt on your political enemies, blackmail Supreme Court Justices opposed to Obamacare or an invitation to wholesale invade the privacy of every American.