Of course in the end Cicero was silenced by those who were taking power. You may have humor and charm, you may be well-behaved and your claims may be correct, but if you are an impediment to the agendas of those in power, they will silence you in whatever ways they can unless others in society restrain them.
It is the lesson of history that Noam Chomsky shouted from the rooftops: when you use your power to silence speech you don't like, you are corrupt, regardless of how you try to disguise it, and the more power you have to do it, the more corrupt, until absolute power corrupts absolutely or society refuses to allow it and restrains you.