Punishment and Forum Moderation
https://www.psychologytoday.com/blog/feeling-our-way/201401/punishment-doesnt-work
https://www.sciencedaily.com/releases/2017/07/170704093910.htm
I may add links. Feel free to post your own links.
Sure, I suppose you could arrange for a totalitarian state to ensure that the person is always feeling watched and thereby inhibit the behavior permanently under an umbrella of anxiety, numbness, and hate (the emotions that punishment produces). But even then, the tendency (or desire) to engage in the punished behavior will not change.
Sometimes, of course, punishment is necessary, like when you stop a child from running into a busy street. But if you want it to stick, you have to reinforce a behavior that competes with running into the street (like stopping and waiting for the light).
I think this is the meat and bones of the situation.
How do moderators reinforce a behavior that competes with "toxicity"?
First thoughts, it sounds like allowing a forum poster to edit their post instead of deleting it. With guidance of course. Not sure that is a practical idea though.
Second thought, the guidance could be the most important part. So, delete the posts, but give very clear suggestions on how the post can be edited to remain within the rules?
EDIT: I think it is important to note that I am the only one to provide third party sources. None of these moderators have been able to provide sources for their opinions.