Which account specifically? The only times I've heard of accounts being locked manually is when a DT member or a highly valued account is suspected to be hacked.
Most likely its locked because you tired to use the security question feature(and got the answer correct)
Not a good idea, would you like to be spammed by the same person? Drop a message each week(with a signed message from a staked address ofc) to theymos.
I have problem in signing the message but able to provide the private key of address associated with the account.
I think theymos is pretty busy in his work.