Lets be honest, we've all done something like this at one time or another.
Like towing nearly 100 miles on the freeway with the hitch tongue unlocked. I found out when I flew through a yellow light and bounced over the camber of the cross flowing freeway. Pop, off it came! I looked in the rear view mirror and noticed something wasn't right. Pulled over immediately but it happened to be pointing uphill. Boy, was it a relief when the trailer STOPPED rolling back and jolted my indignant truck. Sometimes I wonder why our trucks put up with us.
But on the original topic, I've been buying tires from the same shop for years now. I rarely leave the truck out of my sight even while they work on it. Some guys don't like that but they never told me to get lost. Over the years, they figured out there are several vehicles in my family that need tires. And I've watched them respect the vehicles they work on. The "tire monkey" is basically the shop manager, while his dad manages the branch and mom handles the storefront. That being said, I still would rather change and balance the tires myself. We tried a manual tire changer years ago, but it failed on the first bead.
You guys really have me wondering about those balancing beads though...