With the number of both crackers and people coming up with the excuse my brother/friend/pet gorilla was wrecking on my LFS account why not replace the unlock system with a simple login with your account name and password. It would allow you to secure your LFS on a computer that you cannot be bothered/have no need to keep secured/need to allow someone to access your account for whatever reason. It would also AFAIK offer greater cracker protection than is currently available.