Cybercrooks are using a social networking system to bait people.
Hackers are using Twitter to spread a phishing attack called "You Too?"
Phishing happens when a computer user unwittingly clicks on a link that takes them to a malicious software page. In this case, clicking on a "you too?" message will take users to a fake Twitter log in page, where your personal information would be at risk.
If you've received a message like that, chances are one or more of your contacts already has been victimized, so you don't want to click on it.