Fairy tales and believing in Father Christmas could cause children harm.This is according to controversial biologist Richard Dawkins who warned an audience at the Cheltenham Science Festival about the dangers of make-believe. In typically incendiary style, Dawkins suggested it was 'pernicious to instil in a child the view that the world is shaped by supernaturalism.'The 73-year-old acknowledged that the appeal of fairytales lay in their magic but believes they may be causing more harm than we think.He also questioned whether we should let children believe in the myth of Father Christmas at all.'Is it a good thing to go along...