In June, the world watched as tweets from the streets of Tehran flooded Twitter. Frequent Twitter users–and people who hadn’t even heard of the microblogging service–were suddenly and simultaneously witnessing its potential.At the same time, antivirus vendors were warning of new phishing attacks that spread via Twitter. Using Twitter accounts, phishers would follow users and then infect them via a link to a fake profile page laden with malware. Like instant messaging, MySpace, and Facebook before it, Twitter had come of age.
http://www.pcworld.com/article/168859/.html
http://www.computerworld.com/s/article/9135814/Twitter_A_Growing_Security_Minefield