In reply to Tomppa.

Hackers don't guess passwords, they write a simple program and give it a dictionary and let the program guess the passwords, and set them off crawling the web. You can test every 8 character password possible in seconds on a standard PC these days.

I also remember several cases of people being hacked by children at school who guessed passwords...

Passwords are easy to crack precisely because they're meant to be easy for people like you. They don't work if they're not hard, and no amount of please will change that