> But harassment, threats and suchlike no one wants to get. Sender may be happy to send it, while receiver is not happy to receive. We need not to resort to a good for a society explaining, why these should be banned.
How many people like getting criticism of any form? Should we ban all criticism?
I don't think the difference is all that clear cut, or at least there is a lot of behaviour that has overlap where it is unclear which side things fall.
Like take a protest (for whatever issue you want). Is that criticism or harrasment? Or both?
How many people like getting criticism of any form? Should we ban all criticism?