Look the reality as some alluded to is this...there is no way to do this without having a clean slate. Only way to be sure. Moderation has killed dpreview since it was introduced. I would argue that a mod should only be stepping in if racist or severely abusive language is used. Someone lightly suggesting someone is being foolish is not a need to moderate that thread. I cannot stress how much the moderation killed dpreview and stifled discussions constantly. So much so...that when it was announced it was dying...I had already for years seen it as dead or on it's last legs because of this very fact. They have clear bias and even try to protect certain products and companys' with how they moderated. They had clear favourites and protected them; allowing them to have their say but gagged anyone with a contrary opinion under the "stuck record" "rule". Which conveniently allowed their favourite posters' that they shared views with to speak endlessly; but just one mention of a contrary view and it came out. You must realise how pathetic that is. I could not even write this over here without it being deleted. So in a way...this is your first test isn't it?
Moderation should be a very hands off thing and only used in exceptional circumstances. Do you really want the new forum to be like the way the real world is heading? With posters being cancelled and viewpoints stifled? Id have have none of them back because whilst there might be some good moderation there (i am not so sure on this) it is the only way to be sure. No moderation apart from spam and racist language...end of.
Additional. I am reading some of the replies in this thread now with my head in my hands. (Albeit some very good posts too). That said one is poster is using words like "rehabilitate". Look I do not mean to be funny here but...this is not a court. We do not need to draw up a first ammendment style plan of how we ban people or the likes. Honestly I'm sure if someone is banned they just walk away and do something else with their life...maybe they come back under a different name. Does it really matter? Is that a first world problem? Reality check...this is just a forum after all to discuss camera equipment. I would honestly say not to moderate unless exceptional circumstances as free speech is what makes it interesting. There is enough "woke" nonsense in the world as it is without coming here to get it rammed down our throats as well. Let's go back to 2011...leave that crap at the door and let's discuss things in any way we wish. It does not have to be like a creche in here...
Ps is there a dark mode.