They would wind up imprisoning everyone, and no one in China wants to go back to the Maoist 70s. Again, China isn’t a 1984 police state, it is way too chaotic for that. It’s more like whack a mole.
You simply don't want to be the mole (who sticks their head above ground, becoming notable and making themselves heard), and if you are the mole, you are going to get whacked either way.