I agree - and this is the point of limited harms. If I set a fire in my neighbors house "for fun" I will go to prison for a long long time - because of the giga

I agree - and this is the point of limited harms. If I set a fire in my neighbors house "for fun" I will go to prison for a long long time - because of the gigantic potential harm. If my bonfire burns my neighbors fence I am likely to face a shouting match and a bill. In a private forum a malicious lie is likely to create social opprobrium, on the internet it can precipitate the death of children.