Note: Lauda cannot return to the forum, even an imposter cannot use the account. The account was banned and the signed message was invalidated.
Lauda wasn't banned. He left the forum on his accord and said he was never coming back. I think the account was locked at his request, because from what I read he asked the community to tag any account bearing similar username, or if his account ever became active again.
Yeah, KingsDen's post there had me very confused for a second, because I don't recall Lauda's departure ending with a ban. Either way, the person who is Lauda certainly can return to the forum, even if it means using a new account. I'm sure Lauda could prove their identity sufficiently to satisfy the die hard forum skeptics.
That's got nothing to do with the topic at hand, however. And as far as my own recent hack attempt, OP seems to think someone tried to hack my e-mail account. They didn't as far as I know, only my bitcointalk account--I was only made aware of it because the forum sent an e-mail to me letting me know there were unsuccessful attempts to use the "forgot password" function.
Anyway, be safer than I was and not such a dumbass in posting a screenshot of my entire forum profile page. Ugh.