You think you are safe? Most of the dissidents in most of the Gulag Archipelago were once ardent or at least passively compliant and non-objecting Communists.
Take Solzhenisyn: As he himself makes clear, he did not question the state ideology or the superiority of the Soviet Union until he spent time in the camps.
This guy fought, and fought bravely, for the Soviet Union. How was he rewarded? Well, it turns out he wrote quite a bit about it.
And of course people like Trotsky and Zinoviev were central figures in the Bolshevik conquest of the Russian Empire.
No one is safe in a world where safety depends upon continual conformity to continually evolving and changing standards. It is not even enough to slavishly chant everything you are told to chant. If you retain any personality, any individuality at all, sooner or later you will find yourself microscopically out of step with the masses, and that is enough.
Actually, I will append that claim: the only safety is power–and the violent service of power–and that safety is relative, since others are continually vying to replace you. But if you spend all day denouncing others, you can keep the spotlight off yourself for a long time.