We obviously saw it in the Houston Rockets case, where the general manager retweeted something and China literally shut down basketball for a time for the whole country.
In my case, and to your question, people in Hong Kong are still engaging, but I think there have already been signs that they are being tracked. The four young activists who were arrested about three weeks ago were specifically picked up, arrested and charged for social media posting. That is the same charge that Agnes Chow, another prominent leader who was arrested on Monday, is being targeted for. They are saying that she used social media as a way of engaging in inciting secession and calling for foreign influence.