This is an interesting piece from the Washington Post. It's a bit old now but have a read. It's interesting for a number of reasons: what WOULD happen if you put a classical violin genius in to a buskers spot in the rush hour? Would people stop? Would they give him money? How much? How many?
The results are an indictment on the world we live in.
Thanks to Paul Hutchinson (via Linda Mills) for the link. (NB @Linda - I've linked you with PUM. If you want a different link, let me know?)