"Fred's" email address is [email protected]. I've searched for a few terms and haven't found anything useful. The _90 in the email address leads me to believe that it's part of the birthdate (16-17 years old).
If anyone can dig something up (name, location, etc), it'd be appreciated. Comments are also welcome.
Oh, I'm sure you're safe. You probably changed your password just to be on the safe side. But still, to see that someone was trying to get your password does make you feel vulnerable. Makes you want to 'em