By sharing biometric data, you're not just impacting your own life, you're impacting the privacy of all your friends and family.
Ancestry.com DNA samples was used to find long-dead serial killers through the DNA of relatives.
Last will & testaments have been negated through blood tests
You can be guaranteed that your social media profile is being linked to your friends, family, employment, customers, clubs, volunteer organizations, churches and most of all voting patterns.