#4 - Aug. 19, 2010, 3:32 a.m.
Using the parental controls is a great way to get the account on lockdown, Nachten. You may also create a new e-mail address, which is used for nothing else, and apply it as your new Battle.net account name. Once that is done, you could take it one step further and request a password reset, so that not even you know the new password. This, in conjunction with the Authenticator is the most I can think of to keep your account locked down.
As for your other question, we don’t plan on going anywhere any time soon. And hope to welcome you back upon your safe return. :0)