I have always been concerned about my Facebook or Twitter profile security. No, of course I understand that the only way to keep them private is not to register at all. Our world doesn't leave such an option for us, however: we all want to be trendy and, what is more important, popular… So lots of people start writing blogs (ooops, what am I doing now?), or constantly updating their profiles to make them more interesting and to attract visitors. So, British… hah, no, American scientists decided to benefit from this mass obsession. They took a number (a great, a tremendous number) of tweets and studied them to find out how the mood of a person differs subject to the time,day of the week and season (paper). At first glance, the idea made me furious: how could they read all of those thoughts and secrets of others? But then… I thought, privacy doesn't matter when your only goal is to be famous.
By the way, the results of the study can be found as diagrams here.