I often use tools like http://flightaware.com/ or http://www.flightview.com/ to check in on connecting flights and also just to see where abouts friends and family are in the air. Of course those troublemakers can utilize these tools as well.

On the one hand, if the extremely paranoid person (let’s call them “Perry”) has a loved one that’s taking a flight, then “Perry” is able to watch his loved one’s flight the entire time it’s in the air to make sure it doesn’t crash.

On the other hand, “Perry” won’t ever get anything accomplished because he’ll be spending too much time watching all of his loved ones fly across the country.