Don't leave your registration in the vehicle either...
Anyone breaking into your truck now knows where you live...and that your not at home. (If your parked at an airport)
I put a strip of black tape over the VIN number in the windshield so you can't see it. (Guys have called dealerships saying they locked their keys/lost their keys, and here is the VIN...can you make me another key please?)
DON'T use your remote to unlock your truck at a hotel/motel/airport. Theives are now using scanners to "see", and remember the frequency of your remote, and use it when you go inside...(Lost items mostly...unless they have lots of time to work the ignition switch.)
Theft never seems to happen to the people who WANT their truck to go missing...