Some of my forums will be directed to be handled this way:
My response would be the same either way. I would be polite and to the point. Best way to handle those situations is to remain calm and think about what you say before you say it.
As they are unfiltered to raw adult talk.
Others will be handled this way:
It's happened. I gave the member a 30 day ban. If they do it again, I'll ban permanently.
Except for a 3-day ban, a 7-day ban, and then a permanent ban, with an appeal to rejoin after 60 days, as they are professional forums and there is no space for toxicity there. This is about how Facebook handles it and is a good medium for those niches.
Moderators that I take on will have to learn the time and place for each, that is, if they are cross-moderating.
If the users of the unfiltered/adult talk forums progress from a F*** You to racial slurs, etc., it
may be handled in the same way as the professional forum. But, it will probably end up with just stacking 1 warning point until a 3-day ban (3 points) to be a bit fairer, with the slurs edited out.
I have not gotten far enough to create an SOP around this to fit broadly across forums and to address specific situations. But, this is generally where I fall in regards to how I would like them to operate.