Easy: introduce laws that require all communication to be consensual. We don't allow people to force food down your mouth, and we shouldn't allow people to force words into your brain either.

What would this be like? Before seeing something, you'd be asked if you want to see "An advertisement for a home care product." Or "An angry personal attack" (Maybe with some indication of who it's against.)

This solution allows everyone to say whatever they want, and adds the ability for everyone to not be exposed to what they don't want to be exposed to.