The federal agency in charge of aviation security collected extensive personal information about airline passengers even though Congress forbade it and officials said they wouldn't do it

Why am I opposed to things like TSA and PATRIOT? Because they've demonstrated time and again they don't pay any attention to minor niceties like what's legal. Add to that the fact that they are notoriously bad at safeguarding that sort of information and you have a recipe for being a bigger threat than the one they are trying to stop.