Clicking the name of any school in any of the lists takes you to its individual page.

BBC: NEWS | UK | Education | Guide to the primary school tables

But Facebook went further than other sites, in some cases signaling which user name or ID was clicking on the ad as well as the user name or ID of the page being viewed.

WSJ: Facebook, MySpace Confront Privacy Loophole

You can view this by clicking on the school's name in the table.

BBC: Guide: Secondary league tables

When he successfully landed a plane on the Hudson river, searches on his name exploded and everyone started clicking the ad.

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For example, I can earn 1.2GB of free data by clicking the referral link and signing up for a new domain name at GoDaddy.

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