Of course there's nothing Dickensian about teaching children right from wrong, or that inappropriate behaviour can have negative consequences, Staying.
However, it is my belief that these lessons should begin comparatively early in the child's life within a loving framework of praise and positive reinforcement, and by encouraging the child to explore the concepts of morality and social responsibility in an age-appropriate manner.
It's also my belief that core values should be established by the time a child is seven, and if a child who has hitherto given no undue cause for concern exhibits undesirable behaviour I would seek to understand why before I gave any thought to suitable consequences for their misdemeanour(s).
I've also found it constructive to ask the child what penalty they believe should be imposed for their misbehaviour - sometimes young children judge themselves far more harshly than we do, and they need reassurance that occasional lapses from grace are not greatly important in the grand scheme of things.
There is an enormous onus on parents to get it right as our children are our legacy to the world, and there are already far too many individuals on this planet who have been damaged, and are being damaged, by their childhood experiences.
The OP has alluded to her own negative childhood experiences in expressing the desire to give her children the precious gift of unconditional love. The trick is to make children feel secure and loved and 'good enough' even though we may disapprove of their behaviour to the extent that we are moved to administer consequences.
If I should feel that I may have been unduly harsh, I would have no problem in rescinding my decision because children need to know that even adults don't always get it right when the heat of the moment is allowed to cloud sound judgement.