Password Cop from CECash is a great tool to thwart Password sites.
Many sites with members areas run Password Cop. They know the value of this stable tool.
Password Cop (Passwordcop.com) will disable a runaway password and automatically detect if user/pass is from paying client. If user/pass is indeed from an account in good standing, Password Cop issues that client and new password. This way, you dont lose good standing accounts and you dont get zapped in bandwidth fees or devalue your site by giving it away to Password Hackers.
If you have any questions about Password Cop, feel free to hit me up via email or ICQ.
Big B
CECash.com