I know that most of us make sure our children are buckled up in the car....but what about other adults riding with you? Do you insist that adults riding in your car buckle up? (I'm talking about in YOUR car/when you are driving....not when you are a passenger in THEIR car.)
I won't start the car until I know everyone is buckled in. Even my father, I always make sure he buckles up before I start driving.
When my grandmother was still living....she HATED seatbelts, but I always made her buckle up in my car. I bought her one of those padded-things to go over the shoulder strap since discomfort was her reason for never buckling up....it made it more comfortable for her and I knew she was safely buckled.
I don't allow unbuckled anyone in my car. Sorry, if you want a ride, buckle up. I am not paying for the ticket or getting sued if we wreck and your family decides that it's all my fault for not making you wear a seat-belt.