About the Wire tapping aspects of the Patriot Act.
Before the passage of the Patriot Act in order to put a tap on your LAND LINE phone it was necessary to get a court order, in effect an electronic search warrant. BUT, with the advent of mobile, and cellular phones this became a much grayer area, the reason being that these devices utilize not a privacy insuring wire, but broadcast over "publicly accessible" air waves, that was ruled on in the 70's when CB's and scanners got popular. The SCOTUS ruled that using the airwaves instead of a "wire" eliminated the expectation of privacy.
On top of that we have the NSA, these are the folks who gather electronic intelligence and break codes. And boy do they gather.
The NSA monitors ALL ELECTRONIC EMISSIONS ON THE PLANET. While the NSA is GENERALLY prohibited from monitoring US communications English intelligence has equal access to the data and are under no such constraints, AND THIS ARRANGEMENT HAS BEEN IN PLACE FOR 20 or 30 YEARS.
What the Patriot Act did was make it possible for National intelligence agencies to share with law enforcement information that technically they aren't supposed to use themselves in a manner that makes it admissible in Court.
The way the technology works the NSA monitors all electronic signals then sorts out the ones FROM the US that they aren't supposed to listen to, (They give those to the Brits ) But if a LE organization (FBI, State Police etc. ) asks , "Do you have any thing from X phone numbers ? " in the old days the NSA had to say no regardless, with the Patriot Act they can hand over any pertinent intercepts.
As an example shortly before the 9-11 attack a girl out west was kidnapped by a sex offender, several days passed between her disappearance and when her body was found Law Enforcement KNEW that she had been a live captive for some time but could not locate them. There was a brief media stink because an upset analyst at the NRO (Nation Reconnaissance Office , the people in charge of out spy satellites) leaked the fact that the NRO had been able to track the vehicle but because of the way the law was written could not give that information to police, not even to save this girls life.
If your kid gets snatched you may be very grateful for the Patriot Act.