Fear and insecurity keep many a would-be traveler firmly ensconced at home.
Visit your local post office and have them suspend mail delivery while you're gone. You can also do this online at usps.com but that has never worked for me, an in-person visit is better.
I remember very well the July morning in 2005 when we were turned away from the Underground in London due to an “electrical malfunction” and no bus would let us board outside. After returning to our hotel, the BBC let us know what really happened…terrorists had set off a number of bombs in the Underground and a bus killing many people. The city was shut down.