depends on scope

I think that a gov't has an interest in suppressing calls to violence, hate speech, and medical misinformation in the name of protecting its citizenry. I don't think it can ethically suppress other kinds of expression, especially political express, most especially criticism of the government.

I think a voluntary community, however, can ethically set much narrower limits on expression within community space. If a group of friends has a movie night and Jamie keeps spoiling the endings, it's okay to stop inviting her to movie night. An online forum dedicated to urbanism can remove posts containing pro-car propaganda, and ban repeat offenders. A school can have a dress code.

But no person; no organization; no entity below the level of, say, Ma'at; none can set limits on what someone thinks. Thoughts are not consistently voluntary, and are not consistently the result of an ethical process, anymore than laughing when ticked or blinking in a bright light.