Honestly, this excuse has been used so many times, "My friend, my cousin, my neighbor. my brother" etc. The truth of the matter is, it's your computer and your account so it is YOUR responsibility. I will bring this up to Dave, but honestly, you should not be unbanned. In any case, you can obviously still use the site, so it is a minor inconvenience at best.
Umm, if you are friends, why do you share the same password? Hashes match.
Smells like boolshit.
Anyway seems none of us believe the excuse, and with the password hash being the same. Le guilty.