Whilst I agree that you should keep your data safe, have a thought for the companies who sell goods which are restricted by age and those that deliver those goods. If they get it wrong, it is them that face prosecution. People who look much younger than their age get very offended if they are asked for proof when others aren't and we get angry if alcohol, knives, etc are sold to those who are underage. How can the shops and delivery drivers protect themselves?
There was (is?) a card you could get that would give you the chance to prove you were over 18 without having to give your details every time. The trouble was it was easily forged. It seems to me that this would be an ideal time for this sort of service which could be extended for everybody but would have to be a very secure and unforgeable card. It could only be used as proof of age rather than identity which might give people peace of mind.