Then I pose a question, as one who always seeks to improve how they manage an FC.

If you found an FC member doing something they shouldn't be doing and gave them a warning. Then later after having time to process, maybe speaking to other members you see that if left to their devices there's a situation that could escalate in a bad way to harm the peace of the FC.

What would you do?

My concern in this situation and I have been in similar ones, is what if I leave them only with a warning and I come back to find all hell has broken loose and there's a bigger and messier situation that's happened when I've not been around to deal with it?

Because the latter has happened to me on more than one occasion where I look back and think "I was too soft or too leniant". By which point its too late, a s***storm has already happened that could have been avoided.