Wow I really don't know what to say.
It seems the account wasn't really important to lend to a friend.
This still falls under "account changing hands "
I can say you really didn't think this true
What about if your friend shared a malicious malware without knowing? Or shared an information that was misleading?
Imagine a DT or reputable member giving their account to a friend for sometime
The catastrophe that will occur.
Success on your appeal, if there's no punishment it would encourage others to do the same or use as an excuse to escape their faults.