Idea: auto add invalid user names to block list

Hi,

Here is an idea.
One of my websites was under attack by someone who used an invalid username. So I received a warning email saying “Used an invalid username ‘xyz’ to try to sign in.”

Great that this user was blocked automatically, but seconds later they try again from another IP, and again, and again, and again… and I keep on receiving a warning email.

So I then added that invalid user name to the options field “Immediately block the IP of users who try to sign in as these usernames”, and the email warnings stopped. Then they tried a few other user names which I all added to the block list.

Now my idea/request is to have an option to automatically add invalid usernames to the block list at “Immediately block the IP of users who try to sign in as these usernames”. That way, people who are guessing passwords are blocked right after the first guess without me having to add that username manually to the block list.

Thanks!
JP