MY SOLUTION?
What the framers of the constitution said. FREEDOM OF SPEECH.
As explained in the Federalist Papers by Publius (AKA J Jay, A Hamilton, J Madison), “spirited partisan debate”, and by that they meant insults, calumny, etc. is a feature, not a bug of a healthy democratic society.
Partisan debate defuses societal tensions by working the arguments through. When heated rhetoric is suppressed, the convictions behind the heated rhetoric come out in heated ACTIONS, which is always worse than the rhetoric. Democracy is always loud, uncouth, and messy.
You speak for me exactly!
Of course, Hamilton actually ended up dieing over a dispute about his choice of words (in spite of the fact he could not recall uttering them.) So heated words can have their own dire consequences.