Groups from journalists to trainspotters have found themselves on the receiving end of this unwanted attention, with many photographers now fearing that their job or hobby could be under threat.
So serious has the situation become that the MP and keen photographer Austin Mitchell, chairman of the Parliamentary All-Party Photography Group, tabled an early day motion last March deploring the "officious interference or unjustified suspicion" facing camera enthusiasts around public buildings, where they are increasingly told that it is against the law to photograph public servants at all – especially police officers or community support officers – or that members of the public cannot be photographed without their written permission.