As governments want to keep track of you more and more, it comes as no surprise that facebook does not actually let your browser link direct to, a page, but insists on directing you through a link forwarding system, which contains a source implication ID.

The link forward refuses to work unless a valid implication ID is used, and so attempts to force the user into revealing the source of the link they may have received by email or over an IRC channel, or by some other means.

You can demonstrate this by using  http://www.facebook.com/l.php?u=http%3A%2F%2Fblogs.telegraph.co.uk%2Fnews%2Fwillheaven%2F100085835%2Fwhy-that-photo-of-a-dead-osama-bin-laden-is-almost-certainly-a-photoshopped-fake%2F&h=29b54 which actually has my implication ID for this post. Well I think it's just for this post or I'll be implicated in everything wrongfully. And if this is so represents a statutory violation of the data protection act, by not taking care of information which could personally identify me. i.e. personal (false) information which could or is used against me.

Have a go yourself, and enjoy the marvels of the 666 campaign.