I would argue it is not simly a distinction between online and physical. Online doesn‘t exist in a vacuum but is located in our physical world. Something in our physical world drives us to go crazy online. Imagine a perfectly content physical world, would you imagine the people there go crazy online just because it is online?

I would argue we simply live in a world where many people are frustrated, scared, unhappy or just bored. To change how they behave online we don‘t just have to police online better but affect social change in our physical realities. Change the dogma for what it means to be successful. Move from for-profit to for-positive-impact. Teach the benefits of cooperation + friendly competition over battle royale. Such change will carry over to the net. Imagine FB moving away from advertising and for-profit motives to a for-positive-impact poly-centric community governed network for communities, I bet people would behave differently there...