Read the excerpt first. "What will the police do?" Good question -- take their pictures and torture them later so that they can project the image that they're a harmonious society -- when in fact everybody knows that they're not.
Phayul Excerpt: To avoid criticism China will have to sell tickets for events to anyone who wants them. It will be politically problematic and bad press to start denying entry visas to ticket holders. The fear is that organisations like Free Tibet and the Falun Gong will buy up large numbers of tickets and the final of the 100 metres will see the stands full of little old ladies protesting by doing tai chi live on camera. What will the police do? (more)