The notion of pulling out my camera to photograph total strangers on the street is counter to all of my basic instincts. Yet, I admire those who are not inhibited and who are free enough to point a lens at someone and click away.
The work of Vivian Maier almost disappeared from the planet as she had not promoted her work during her life. After her death in 2009 her negatives were discovered and were published to increasing acclaim.
John Maloof, who is the owner and curator of her images maintains a website featuring Vivian's remarkable photography. It is well worth a close look: http://www.vivianmaier.com/