Google published tips to keep yourself secure when working over at orkut. Here're the tips:
Ignore phishing and hoaxes, are false and usually alarming messages that attempt to persuade you to forward them to others. If you do so, you end up spreading a lie. Phishing is an attempt to steal personal information through fake emails or websites. To know when you should immediately delete or ignore these messages, here're some common signs of phishing and hoaxes:
If you notice any strange activity on your account, change your password and follow the steps in this security checklist.