Facebook limits purchase-tracking system after users protest
Seeking to keep the peace in its popular online hangout, Facebook has overhauled a new advertising system that sparked privacy complaints by turning its users into marketing tools for other companies.
Under the changes outlined late Thursday, Facebook's 55 million users will be given greater control over whether they want to participate in a three-week-old program that circulates potentially sensitive information about their online purchases and other activities.
Facebook provided two different opportunities to block the details from being shared, but many users said they never saw the "opt-out" notices before they disappeared from the screen.
