I usually lock my doors if I don't have the top down, just to give myself a false sense of security! I don't worry much though, cause I try not to leave anything of much value in sight. Even if I do nothing more than cover with a jacket or put in the unlocked glove box. The controls for my remote CD player tuck under the dash when not in use and the stereo is stock. However, in 3 years, I don't think I've locked the tailgate but a couple of times.