Don’t be that jackass who drives a pickup with an inadequately secured load in the back. You could get somebody killed. Take the time, every time, and make sure your stuff is tied down securely–then tie it down some more. This has been a public service announcement.
In unrelated news, my kids are going to be the only kids on the planet whose bunk bed has road rash. Also, three hours later, my pulse is almost back to normal.