Folks, Daniel and I are talking about a movie directed by Johnnie To, called Eye In The Sky, that showed in great detail how police surveillance was done in Hong Kong. The techniques shown in that movie are all used here now... Hope you enjoy your cell phones and smart cards
Other Johnnie To films that are a real trip are PTU, Breaking News, Exiled, Vengeance... Many films with lots of guns!
Wow! You have watched all those movies. Yes! The techniques used in the Eye of Sky were unveiled by one of the surveillance operatives who is friend of the director. All those techniques are real techniques used by surveillance. However, nowadays technology plays a much important role ;-)