I don't know about censoring anyone besides neo-Nazis or the like who spout the destruction of a type of people.
Being an anarchist and advocating the most freedom for everyone, I think pro-capitalists should be allowed to talk without censorship. Remember that if the people (for themselves) revolt against the capitalist system, these people (the capitalists) will be regarded for the system the are advocating, and exploitative and corrupt system of wage-slavery.
In a true revolution, the people will have evolved from capitalism, and it will be considered a past, and failed, form of economy.
-- August
If we have no business with the construction of the future or with organizing it for all time, there can still be no doubt about the task confronting us at present: the ruthless criticism of the existing order, ruthless in that it will shrink neither from its own discoveries, nor from conflict with the powers that be.
- Karl Marx