There is usually a setting for the rear seat reminder. It's to remind people to not leave their babies in the car. Maybe the volume is purposefully set a little high to wake the kid up just in case you forget.

Do people really need a reminder to not forget their babies? From a car? What?

Fatigue, some medications (and drugs, to be fair), and stress, perhaps? Being tired or stressed has made me miss exits. Then again, songs on the radio or whatever have, too.

99.999% of the time, no. But the consequences of forgetting are disastrous, and it's happened to plenty of well-meaning but distracted and preoccupied people. It was one of my greatest fears when my kids were young.

In 2006 I had a new Prius that turned on a loud, annoying back up beeper. It would wake my theninfant son up. I finally found a "cheat code" that let me enter a service menu and disable it.