No picture, but yesterday at the intersection of two busy roads, I saw a semi-truck with a flat trailer waiting at the light. There were six workers sitting on the edge of the trailer, chatting and swinging their legs. I wanted to see what happened when the light changed, but I drove on before they did. I can’t imagine they’d have gotten far without a ticket.
We often see landscaping workers riding in the open back of a dumptruck or stake-sided flatbed. Not quite as unsafe as you saw, but probably equally illegal.
I can’t really imagine any LEO bothering to fuss at them. At least not around here = SoFL.