Are you comparing facebook to a utility company? But honestly, misinformation in this day and age is such a huge problem. If a source is willfully spreading misinformation (that can be fact checked) then yeah, why should they be allowed to do that? They have absolutely no value, except for the people trying to deceive in order to further their agendas.

So a single billionaire should decide what people can and can not talk about?

My guess is you are a Monarchist then?

Facebook for most people is effectively a utility in all but name.