Parent of 2 actually, and lots of time.

I'm talking about child locks, not auto-lock. Locking the door from the inside. A commenter above suggests that it's to stop the little idiots from popping out into the middle of the street .7845 seconds after I put it in park. That actually makes some sense.

Ah got it. The conversation upthread had focused on auto-lock, and someone had mentioned child locks in passing, and my read of your comment was on the auto-lock on shift to drive (or on starting to move). And my bad for falsely guessing you weren't speaking from personal experience!