Hi,
I never set pgp key on my profil, so cannot sign a message.
Anyway, it's not a problem to use a new account on the forum....Btw i'm afraid of a security issue.
How my cannot was hacked ?
Could be a variety of ways that you could of been compromised. Have you downloaded anything which might of been able to compromise your account? Have any of your other accounts been compromised? Possibility of compromising your login details through a phishing website.
I see the account has posted on a few altcoin threads, and downloading clients for these have been known to compromise passwords for both the forum, and Bitcoin. It's almost certainly nothing to do with the forum.