...just walk off and forget their shoes?
Quite easily if you're a kid.
I left them there thinking the kid, or his parents, would later come back to pick them up. Then I thought of how many people before me did the very same thing, leaving them for their owner to return? Thus there they sat 13 days later, as I walked away.
This brings to mind not long ago when I went to a Kohls department store to buy a new dress belt. In trying on several prospects I had removed my old friend that had been faithfully holding my pants up for far too many years for me to recall. The next morning when I went to put on my britches, my old friend was missing. My heart sank. I drove back to Kohls and was there when they opened the doors. Off to the men's department with slim hopes I speed-walked and miraculously my moldy old worn out military web belt was still hanging there draped over all of the shiny new leather dress belts right where I had left it, 24 hours earlier. I grabbed my baby and marched out of the store, my head spinning with my good fortune. What were the chances? How could no one, especially store personnel, not notice this mangy looking belt hanging there at eye level? Now, whenever away from home, I never ever set anything down but instead hang it off of me somehow.
My life has come to that.