1. Why doesn't TSA or DHS realize that...?
...while they're making it more difficult for terrorists to travel through the air, they can easily commits acts elsewhere?
My idea of TSA thinking: "Let's sink millions into uber-radiation revealing scanners and inappropriate pat-downs, while terrorists learn that they should just stay out of the airport."
Nothing is stopping terrorist operatives from making car bombs, shooting up crowded places, or even blowing up buildings.
2. How long is it before DHS tracks our purchases or makes us undergo scans upon entering malls, schools, etc.?
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“Anyone who trades liberty for security deserves neither liberty nor security”--Franklin
I would "thumb up" your answer because I agree, but I wouldn't want people to think I'm sympathizing with that plan.
If you've noticed, the only successful terrorist activities of the last few post-9/11 years have been majority non-air-related (train bombings, London bombings, etc.).
Secondly, all the SERIOUS airline threats have been handled by the passengers, not TSA, otherwise we would have never seen the end of the news of how TSA busted this guy or that guy. The Nigerian, shoe bomber, etc., were not foiled by some TSA agents, but by observant passengers.