Police in Hong Kong have launched a hotline where residents can report breaches of the national security law imposed by Beijing earlier this year.
The law criminalizes secession, subversion and collusion with foreign forces. It has silenced many protesters since it came into force.
Hong Kong residents can send images, audio and video files to the hotline.
Rights groups say they are concerned the service could be used to target those with opposing political views. more
It is worth remembering that "Citizen Snitch Surveillance" is a tactic of cultures that eventually fail.
About one in 100 East Germans was an informer for communist East Germany's secret police in 1989, according to a new study. Political ideology was their main motivation, both in East and West Germany.
The Stasi kept detailed files on thousands of East Germans
