The government are hoping that there will be an increase due to people not being aware that they must opt out , otherwise those people would have already opted to be organ donars and they wouldn't have any problem in the first place . But of course there will be a minority of people who were unaware of the organ donation scheme and sign up . Ultimately I think this is a bad idea and morally wrong because many people don't agree with organ donation for ethical or religious reasons . It seems to me as bad as if the govt. were going to adopt a 'guilty until proven innocent' rather than innocent until proven guilty .