[semi]

It would also be very rare. The penalties described here start at 30s, I don't know the max, but presumably whatever is issuing the bad behavior from that IP range will give up at some point when the sshd stops responding rather than continuing to brute force at 1 attempt per some amount of hours.

And that's still assuming you end up in a range that is actively attacking your sshd. It's definitely possible but really doesn't seem like a bad tradeoff