One of the most viral activities on the Web is sharing links. It is fast and easy, and a good way to communicate ideas. What started out as something people did via e-mail and bookmark-sharing services like Delicious, is now moving to Facebook, Twitter, and other social broadcasting services. It is just so much more efficient to share a link once with all your friends and followers than to send it to each one individually.
Are URL Shorteners A Necessary Evil, Or Just Evil?