Car Design Pet Peeves - Remotes

I guess is the week where I just rant about car design...

Over the past couple of years, I have rented and borrowed a couple of newer cars (albeit almost all from Japanese manufacturers). And one of the things that really annoys me is how when you hit the unlock button on the key fob, it only unlocks the driver's door. Ok, why?

Why wouldn't you design it such that when you hit the unlock button, it unlocks all of the doors? That means that a large percentage of the time, you have to hit the unlock button twice so that your passengers can get in. I just don't understand why something would be intentionally designed in that manner.

I'm trying to imagine a scenario in which only unlocking the driver's door would be desirable. And I really can't think of anything reasonable. I mean, are people worried that they'll be walking to their car, and they'll want to get in, but not let some attacker in from the passenger side of the car? That doesn't really make any sense, because if you're getting attacked, they'll either be on your side of the car (unless they're stupid), or they will just point a gun at you and tell you to unlock all of the doors.

What's next? Are they going to start programming the door unlock button on the inside of the driver's door to only unlock that one door unless it's pushed twice?