Twitter came under fire recently after it quietly changed its privacy policy so that users can no longer opt-out of having their activity on the service tracked for advertising purposes. Advertisers want to know how often users who've seen their ads actually convert into customers, and they're willing to pay Twitter extra for this type of insight. Twitter decided it would force users (except those in the EU) into precise tracking so it doesn't lose out on any of those precious ad dollars.
Fortunately, there are alternative ways to view Twitter if you'd like to avoid your every cursor movement being monitored. One of them, called Nitter, redirects Twitter web links to an alternative, re-skinned version of the social network that yanks out all the code necessary to track your behavior.