Have you seen a message like the one below when using twitter?
Wonder why twitter’s so keen for you to do that? A quick check of the settings page gives it away:
Yep – Twitter’s encouraging website owners to embed Twitter widgets on their websites so that twitter can track the websites that its users visit. The real travesty here is that, I suspect, the majority of people embedding the widget and the majority of twitter users have no idea that the tracking is taking place. Not cool, Twitter.