I don't understand why the big deal over leaving the truck unlocked with the window down... Or you what to leave expensive stuff in the truck ? If you don't leave anything in the truck, Why lock the doors? I drove many convertibles in my life and I never locked the doors... Because if you did, They cut the top and stole the radio... Leave it unlocked and they just stole the radio... It was cheaper that way...
Jim...
Yep, the advice never to lock a convertible is sound and widely practiced. As for car radios, these days aren't they designed to be pulled out and taken with you when you park the car? When I lived in Southern California, it was common knowledge that if you didn't have a pull-out radio you wouldn't last a month before you returned to your car to find the window smashed and a bunch of wires sticking out of your dashboard. This was before satellite radio existed, so I have no idea what the situation is today. But the bottom line is I wouldn't leave anything of value in my car, anywhere in the world.