A "Nostr Account" is your private key. You won't be able to continue using this "account" if it was hacked since someone can simply impersonate you at will any time in the future. Persistent public-private keypairs are not foolproof. 

 It turns out it was my little sister posting bad stuff while I was using the toilet!  All good! 

 Someone with a copy of your private keys could easily post an excuse like this. I'll be watching your activity for a while to see if any more contradictory or untrustworthy behavior comes from this npub. 

 Thank you I appreciate that!