Parents could face a £5,000 fine for driving their children's friends to a sports event or Cub Scout meeting.
They face punishment and a criminal record if they have not been vetted first by a massive new government agency.
An astonishing 11.3million people - one adult in four - are likely to come under the watchful eye of the Independent Safeguarding Authority.
Launched next month, it will be the biggest vetting and clearing system in the world.
Every person who comes into regular contact with children or the elderly, through work or volunteering, must be approved by ISA officials checking for criminal convictions, disciplinary action and even unproven allegations.
It goes way beyond the current Criminal Records Bureau system, which covers only 6million people.
