I take that to mean you have no examples. Your logic is sort of like saying we don't need all those FAA safety regs, because after all the planes are landing safely, and how do you know they wouldn't even without the regs.
How about all telephone providers except AT&T rolling over upon Gov't requests for phone records? AT&T told them to get a court order, gov't didn't and dropped their "request".
It's what you 'don't know about' more than what you do know about what the gov't wants and is getting w/o court orders.
I ain't a fan of the PA. You got a problem with court orders and due process, Steve NO?
