London, England.  This is a stern warning, and it presented a situation to me that I never would have even considered, until the City of London’s finest had suggested it to me.  The sign had the same effect upon me as the sound of running water.

Anyway, I’m proud to admit that I am a law abiding citizen, and had no desire to be dealt with by the Police or watched on video surveillance.  It would have seriously depressed my short visit to London.