There is a strange subculture of Craigslist art, which involves artists posting offbeat requests on craigslist and seeing what happens. Some examples:
Kenneth Tam offered cash to any couple who would let him observe, and film, an ordinary dinner in their home while he sat, silent, in the background.
A California teenager traded up an old phone on Craigslist for different items until he eventually acquired a Porsche.
A bank robber escaped the scene of a crime by arranging (via Craigslist) for a dozen identically dressed and unwitting civilians to be standing at the exact place and time of the arrival of the armored car he intended to hijack.