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[ethercat]

Spammers and other malicious people are using link shortening services to obfuscate links that you either wouldn't want to visit, or links that exist purely to infect people's computers and add them to their botnets. 

http://longurl.org/
http://www.longurlplease.com/

These sites translate shortened URLs (links), such as those created with tinyurl.com or bit.ly (and many others), without you taking a chance on visiting a site without knowing where you're going first.