Michael Zinman collects signs he buys from beggars, and writes about what he discovers from his interactions with their designers and the designs themselves. Clearly there's a lot of sharing of ideas going on:
I did engage with all the individuals I purchased signs from, and quite often, my offer of purchase was declined. I would guess at least two out of every five people on the street turned me down, and I was not able to purchase their signs. They were just unwilling to part with them. I think it was a matter of self dignity, and I was ever sensitive to their condition and never tried to further persuade them to sell.
A few were masterful actors. One in particular, a really beautiful young girl, was sitting on the ground at 7th Avenue and 54th Street in New York City, sobbing silently. The sign, which is included here, told the story of her being hit on the head and robbed of all her belongings, and needing bus fare to return home. I was that affected I not only gave her $10 and bought her sign, but, walking half a block further, returned and gave her an additional $50.
A week later, there she was. Same place. Virtually same sign. As I walked by, we did make eye contact, and she gave me a small, sly smile and looked down. What an acting career she is missing!
(via Kottke)