Stop being such a frightened coward. Be a man and accept that there are risks in life. You simply cannot stop suicide bombers. Most of them don't have a Facebook page for your friends to monitor. They may not have an internet connection at all and certainly don't have a smartphone.
Some of us value liberty, value not being watched by law enforcement agents every second of our lives to see if we might be breaking some law or might secretly be planning to blow up the white house. Do you have no understanding of the sort of freedom this country was founded on?
Pff, shows what you know! The NSA/TSA/DHS have already stopped hundreds of thousands of terrorist plots based on monitoring our communication!