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Account security should be taken very seriously in order to avoid such incidents, because prevention is better than cure.
Maybe users can also make use of the "Secret Question" feature which might help you recover the account if it's stolen, though it is mentioned that this is not recommended since it also kind of acts like a second password, I still think that it is fine as long as you create an answer which someone should not be able to guess easily. (was there any history here where a user successfully retrieved the account using this feature?). Probably, in relation to forum security, signed message really will help recovering the account.
Isn't the option to recover your password by answering a secret question disabled on the forum? I'm not sure, but I think I read somewhere that if you try to recover your password that way, your account will be locked and you will have to request a manual review and recovery process. (I can't find any details about it now though.)