Many people overshare, every time that you share your data with any company, medical, social, etc, consider that it may be sold (most probably) or stolen by hackers (likely) and sold online.
To create privacy awareness we require to understand the dangers of over sharing. Our private information and the one of our families may end in the hands of criminals, those criminals may consider us a target and make our life quite difficult, steal our identity, attempt to hack us, take over our social accounts and bank accounts.
We need to be aware and reduce our sharing of private information and trust in third parties with our private information.