Two nights ago, one of my sites was hacked by Mega-Scorpion, at least that's how he identified himself. He left a trail and a link to a forum (Alboraaq Hackers) where he is a part of - a forum of hackers.
If you have been hacked by Mega-Scorpion or Rat.Techie (this other name also showed up on my other site's homepage at one moment), you would have probably seen something like this image above.
It was quite scary that it prompted me to change my other passwords to a more difficult combination of alpha-numeric characters, case-sensitive and including other characters allowed for use. I would advise that you do the same thing so you could lessen the chance of getting hacked by someone like Mega-Scorpion because hackers do exist!