When Facebook users shopped online, Beacon told friends and businesses what they looked at or bought. Many considered the data sharing to be an intrusion that exposed them to more scrutiny than was comfortable.
Now Beacon will be an "opt in" system that only tracks data if explicit permission is granted to Facebook to do so.
"It also says a lot about the ability of internet users to band together to make a difference," said Adam Green, a spokesman for activist site MoveOn. MoveOn was at the forefront of protests against Beacon and set up the petition to gather signatures on 20 November. Link