In a statement, the Hong Kong police’s Cybersecurity and Technology Crime Bureau said he had been arrested because he was suspected of conspiracy to cause a public nuisance. He was released on bail, but the police said an investigation was continuing. Mr. Ip said he had not attended any protests this week.
Many of the protesters are college-aged and digitally savvy. They took pains to keep from being photographed or digitally tracked. To go to and from the protests, many stood in lines to buy single-ride subway tickets instead of using their digital payment cards, which can be tracked. Some confronting the police covered their faces with hats and masks, giving them anonymity as well as some protection from tear gas.
On Wednesday, several protesters shouted at bystanders taking photos and selfies, asking those who were not wearing press passes to take pictures only of people