As an ancient fireman, I would agree with GB500. The more you are visible, the more you minimize the risks.
But as a latin(lover) and french I loved stephan's tirade for freedom.
But in name of freedom, french riders do anything. Anyone driving in the suburb of Paris knows what I am talking about ....
Talking about the cops : they have real rider's garments only for a few months/years. In summer they keep on riding in shirt and use synthetic trousers that don't resist in case of falling. They have to fight for safety equipment. Money money.