my city has a large homless population and a significant portion of them ride bicycles, often with creatively constructed trailers attached. they use them to collect bottles and other recyclable goods as well as to cart their livin' supplies around. If it keeps em busy and able to make money through recycling instead of breaking into cars for crack and liquor money I am all for it.
I know one in particular who worked for a temp labour agency a while back, he pulls like 3 trailers behind his "custom" chopper(thats cut off forks jammed onto the forks to extend the front end) and does like 60+ k round trips regularly