An internet hoax, or study. Created by students at the University of Melbourne.
They make up assignments, and get members to join from their website neurocam.com. They create an atmosphere that you are in a "secret society". These assignments can vary from leaving certain pictures in books, to taking pictures of certain things in your area. All assignments are met with a deadline and are to be emailed back to neurocam.
"I just got my latest neurocam assignment completed!"
"Good to know you used your time wisly."