The best course of action as far as proving account ownership is concerned is for the member to at least stake a bitcoin address. That way, if the worst should happen and the forum account is compromised, it should be relatively easy to sign a message and have access to the account returned. If becomes a different scenario if the computer was attacked because there is a possibility the wallet information (as well as BTC balances) could have been compromised.
I also noted the OP has not been online for over a month using either of his two known accounts but that does not mean he has not created a new account. Maybe he is already back and would like to keep the new account private and not associate it with his past.
I have visited his profile and I found that DirewolfM14 has an active flag against harizen and he has also left a negative tag on the user's account. I hope that once OP comes back and makes us sure that his account is unbanned and is safely controlled by him not someone else then you people can remove those tags from his profile.
I know sometimes it would be hard for such users and they can face huge issues even if they get their account back because some members still might consider the account as hacked one, and they might not remove the negative tags that they have left.
So far the guy hasn't been active on forum for at least a month now and I hope that everything is going right on his side because sometimes people can have other issues then the forum's related issues and that can be a reason for their absence.