Freedom to Photograph

I am getting increasingly worried by the interference by the police when people are going about the perfectly legitimate act of taking photographs. This week we read in The Guardian that two Austrian tourists have been interrogated in London for taking photographs of a bus station because they may have been planning a terrorist attack. They were ordered to delete their perfectly legal photographs. These actions have a tremendous effect on tourism as the story echoes around the world (I first learned of it from the USA.) Whilst I accept they could have been terrorists have we totally forgotten the law of probability, and thrown common sense out of the window? Why am I getting heated? Because virtually every day I take images that could be used by a terrorist, and I them offer them for sale on various web sites around the world. The chance of a terrorist buying one of my photos is about 99 million to one, but it could happen and therefore the police could stop me at any time going about my legitimate business. Do we want to live in this type of society? Personally I don't!