Facebook tracking online purchases

Facebook has been in the news again after its recently launched Beacon tracking system caused alarm by reporting users online purchases to their friends. After much criticism they changed the display preferences so users have to opt-in for their purchases to appear on a news feed.
Now it seems further information has come to light that allegedly shows Beacon reporting online purchases and activity back to Facebook HQ, whether you're logged in or not and that no warning of cross site communication is evident.
Something to bear in mind while gathering your Christmas gifts this month!

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