Sorry, Don, I'm with Peggy Sue on this one. My dogs may love to hang their heads out of the windows of a moving car but they only ride with restraints, either on the seat with a seatbelt or in a crate. If I have to stop quickly, any dog riding free is at risk of injury. It's like those folks who think it's OK to let their dogs ride free in the bed of a pickup truck. Sorry, it's not only dangerous it's irresponsible. Can folks do what they want to do? Absolutely! Will I be willing to tell them if I think it's wrong: Even more absolutely!!