I was searching for some documentation about the sshd error messages.
Unfortunatly with no success so far. So I'd like to ask a question here:

I had some trouble with someone who is trashing my logins with fake login
attempts. Actually that individual is never trying to login, but does only
initiate connections with my system without sending any passwords.

Do you see any security risk by setting the LogLevel to ERROR?

Best Regards,