Craigslist Joe (2012)
Craigslist Joe is a 2012 documentary film that follows Joseph Garner for a month of travel across the United States, solely supporting himself via contacting people on the website Craigslist. He spent the month without using any form of currency and without contacting people he already knew, relying on the "kindness and generosity" of Craigslist users.
More at Wikipedia.