Wow.. a tough crowd. Many here are of the age that as long as you fit into a spot you went, whether it was a car, van, or truck box. No seat belts, no nanny state. Baby's rode in their mother's arms, not some wiz bang $2k car seat that instantly transforms into a stroller.
Flea market.. figure he put the baby in, started car to get the heat going and then was outside waiting for someone to bring what he bought or what not. What can you do when someone jumps in and rips off and who would ever expect that to happen?
Good thing is Baby is safe and Dad learned a life lesson.