For a long time I worked in a developing country in Africa.
You didn't go out in public with a camera. If you did you were in danger of getting arrested as a spy.
We used to make fun of the police (in private) for their paranoia. "Of course," we'd say, "back in the home country things are different. Our good old British bobbies realise that no self-respecting spy is going to draw attention to himself by brandishing a camera."
Well ... we were wrong ...
In January of this year well-known travel photographer, Jane Sweeney, was stopped, searched and questioned by the police in London for using a tripod in the vicinity of the London Eye.
Then this article was been published in today's UK Guardian newspaper.
http://www.guardian.co.uk/technology/2008/jun/05/news.terrorismLooks like PC Plod is the same the world over.