[n4r9]

It is widely accepted that speech can be used to inflict emotional or psychological abuse.

You're very concentrated on people simply being "offended", as if the law can be used to prosecute you for once calling someone an idiot. It can't as far as I'm aware, and very few people want that.

Speech can be harmful if it deliberately and consciously exploits or invokes trauma, undermines identity, or inflicts significant anxiety, depression or PTSD. Intimidation and harassment are often carried out via speech. It is illegal in most states if carried out on the basis of race, religion, colour or sexual orientation.

Again, my point is that there is a grey area around the line where speech becomes harmful and ought to be censored. The problem is that we don't have a coherent definition to determine where exactly the lines is in that grey area, and John Stuart Mill didn't either.