I thought of a couple of fixes, probably easier than going to the dealer:
1. Don't try to open the door if you're moving, or
2. Don't try to open the door until you're driving at least 20 MPH or have gone 1/4 mile, whichever comes first, or
3. Just hit the "Lock" button with the finger closest to the "lock" button before you start driving.
OK, I'm fooling around, but seriously: when was the last time you tried opening the door when you were driving? If I had kids or mental patients in the back, that I was afraid would try to exit while in motion, I'd lock the truck myself before I got moving rather than worrying they might try to exit while the vehicle was going 10 MPH.