It always amazes me when discussing seatbelts how few people seem to know that they don't just protect you, they actually make for safer driving for everyone. When a collision occurs or even just in the face of evasive maneuvering the seatbelt keeps the driver in the driver's seat at the controls, and keeps other occupants from becoming projectiles. It's much harder to swerve, brake, or do whatever is necessary when the driver is now sitting in the passengers lap.