Because it’s proper blog etiquette to quote; I’m quoting regular jEN, who quoted John C. Dvorak,  who quoted PC World.  Ain’t it grand? 
PC WORLD: Facebook Admits Ad Service Tracks LOGGED OFF Users.
Facebook’s controversial Beacon ad system tracks users’ off-Facebook activities even if those users are logged off from the social-networking site and have previously declined […]

Popularity: 69% [?]