Seems there is a lack of common sense when people use roundabouts(rab) on a bicycle. Keep in mind a rab is simply a free flowing 4-way intersection. Blasting through at 20mph will likely cause trouble with cagers. When going through a rab take your time and anticipate the move of the drivers around you. Always be prepared to stop. I have ridden in many countries and have not experienced troubles in rabs on a bicycle, including the USA. Of course I look out for my personal safety first and do not consider myself equal to motorcars, and am always courteous towards them. After all they are bigger than me and playground rules apply. Better alive than self righteous and maimed or dead.