Not sure I understand what you’re asking or maybe my post wasn’t clear.
To clarify, yes, you are right, by banning them I don’t want them there.
The only additional thing is that I also don’t want people to be able to continue posting after I’ve banned their IP. Currently, it seems that users are able to continue posting on banned IPs indefinitely. I’m guessing that it is due to them being already logged in prior to the IP being banned.