The worst that can happen is that someone steal your Gmail account with all its consequences.
This morning I woke up with several emails from users telling me that my Google Docs has been compromised by a hacker group known as Al Quadim. They have write the following message:
Now I'm a little nervous. I'll see if Google want to reset my password. I wish someone in the comments to tell me if you has been in the same situation. I will keep you informed.
NOTE: Today is like the April Fools' Day in Spain. Sorry for the joke.