Please be carefull using Twitter.
New worm taunts Oprah, Ashton Kutcher, Twitter..http://www.darkreading.com/blog/archives/2009/04/new_worm_taunts.html
Graham Cluley, Apr 18, 2009
Another weekend, another attack on Twitter users. On the same day that it was revealed that 17-year-old Mikeyy Mooney had been offered a job on the back of the worms he had written, a new version of his Twitter worm was unleashed.
Interestingly, the worm is referencing the account identites of various celebrities, including Ashton Kutcher (who has more than a million followers), and chat show queen Oprah Winfrey.
It's possible that this is being done in an attempt to entrap celebrities with a significant online following. Can you imagine the impact an attack could have if it managed to ensnare a Twitter user with more than a million followers?
Although Twitter's security team claims that it has now taken steps to ensure that the systems can not be exploited by this way again, it would be a braver man than me who would put money on Twitter being untroubled by security issues in future.