You ever get e-mail from firends or associates, that are kind of annoying... like those jokes, or mail about a virus spreading around and to "be careful?" Well a study recently found that e-mail forwarding can be linked to your social status:

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 But passing an irrelevant or out-of-date link on to contacts can be annoying, thus lowering the sender's social status in the recipient’s eyes.

http://www.newscientist.com/article.ns?id=dn7662