facebook cookies monitor your internet usage?

[What]

if true that's gotta be contrary to digital privacy legislation right?

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Facebook is at the centre of a new privacy debate after a blogger accused the site of continuing to collect information after users log out.
Australian Nik Cubrilovic revealed how Facebook keeps cookies running even when users leave the social networking site.
Cookies allow people to be tracked as they surf the internet and can potentially be used to build up a profile to market to advertisers.
Mr Cubrilovic, a security consultant, posted a lengthy blog detailing how the social networking site keeps the cookies running.
He said: "Logging out of Facebook only de-authorises your browser from the web application.
"A number of cookies (including your account number) are still sent along to all requests to facebook.com.
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but as a billion billion big business they wont be treated like spotty teenage hackers.. money grease will make the authorities look the other way, betya..
push the issue f/b are loaded and more than capable of giving each and every user a fiver in compo.

yay