Snipped from New Scientist:
Benjamin Gross at the University of Illinois, US, and colleagues studied email forwarding behaviour by conducting informal interviews among email users. He says forwarding emails plays a vital role in constructing and maintaining modern social ties, despite the phenomenon receiving scant attention from social scientists.
Forwarding a genuinely amusing or interesting link to a friend, for example, shows that you are thinking of them and are aware of the sort of content they like, Gross says. But passing an irrelevant or out-of-date link on to contacts can be annoying, thus lowering the sender's social status in the recipient's eyes.
