Unsecured loads can be a real hazarxd. I have been guilty of it myself.

Big hardware store went out of business. I bought a full bale of 3/4 re-bar and had it loaded on my Dodge pickup. Rods were 10 feet long and my bed was eight, but with the tailgate down it did not extend much past the end. Bundle weighed about 500 LBs and seemed rock solid.

Driving home was all local streets, 30 MPH, so I did not secure the load. As I pulled away from a stoplight, the entire bundle slid right out in one piece, landing right in front of a police cruiser.

Not only did I do this foolishness in front of a Cop, but my truckplates were expired.

The officer helped me reload the bundle, piece by piece. All 100 pieces. Then sent me on my way. We later became frends (he ran security for our subdivision) and I asked him about the expired plates.
"I can't believe you didn't notice them?' I asked.
"Yep but you were having enough issues that day."

Got lucky that day. And so apparently, did anybody behind me.