In the past I've never really paid much attention to security issues when it comes to user names and passwords. Frankly I figured it was all a lot of overblown hype. This led to an unfortunate incident that involved my website being attacked, apparently by a skillful youth with a propensity for mischief.
The main security flaw with my website was probably the simple fact that the username and password were exactly the same. Granted I did realize that this wasn't highly intelligent but I didn't have the power to change it myself, and I didn't think it really mattered enough to bother about it. Having an identical username and password is a massive "no-no" in computer security. Your username and password should not even be related along the same line of thought. A username of "Dragon" and a password of "Fire" is not a secure combination.