If you are banned for a certain activity then I am pretty sure no one is going to listen to you. Although if your account is locked due to some suspicious activity then there is a chance to get unlocked.
Look who's not reading.
It seems like signing a message is the best way to go. I suggest to post it here since hilariousandco checks Meta from time to time and can unlock it for you.
actually the only btc sent i did was on a pm ...no idea if that can be used as a prof