Jimmy,
Over here in NZ, it is an offence to carry stuff on a vehicle or trailer, untethered.
You can be served an instant fine of NZ$800, for being found to have a load that is insecure.
I've been to I don't know how many fire rescue calls where something has left the vehicle that it was "tied" to and gone through the front windscreen of the car following the carrying vehicle.
You can end up in prison here if it kills someone and rightfully so.
They don't make strops for the fun of it.