We believe that most of the people in the world are basically honest. We've driven all over the country with boats on the car and people haven't given them much notice other than "cool boats!"
Of course, we don't park the truck on the south side of Chicago with five-grand worth of sea kayaks on the top and leave them for the weekend. Sad but true - some people are thieves and true to form, they steal stuff.
Yakima makes it easy to keep things locked down tight. Many Yakima accessories take lock cores so they are always there when you get to the trailhead or take-out.