Anonymous wrote:I always do, but I know people don't especially if it's 3 across in the back. When I was younger and taking cabs around DC for work, none of my coworkers wore them.
If the car rolls every person becomes a over 100 pound unctrolled weight that can smash into everyone else in the back. If the car comes to a very sudden stop, they also can become a projectile flying forward into the people in the front seat.
I explained this to my MIL when I insisted she buckle up in the back seat with my kid (she wanted to sit next to him). An unbuckled passenger isn't just a risk to themselves.