User blog comment:NOP Man/Illegal Login/@comment-5398529-20130601173205

If you used the cookie exploit trick, that's why.

What the cookie exploit trick is is a person asks you to give him/her/it your cookie info(using Chrome or Firefox, or anything letting you view a web page's source). In return, the person will give you another person's account.

In reality, you've been tricked into giving away your account and receive nothing at all.