> historically they have never told my spouse about my affair
Have we forgotten Google Buzz? Google changed GMail to publicly list the people you email most. In one case, this de-anonymized a woman's blog and enabled her abusive ex-husband to stalk her. https://fugitivus.wordpress.com/2010/02/11/fuck-you-google/
This is IMO the most likely way that "bad stuff" will happen: not maliciously, but through privacy-invading misfeatures connected to pushing people to share more.
Have we forgotten Google Buzz? Google changed GMail to publicly list the people you email most. In one case, this de-anonymized a woman's blog and enabled her abusive ex-husband to stalk her. https://fugitivus.wordpress.com/2010/02/11/fuck-you-google/
This is IMO the most likely way that "bad stuff" will happen: not maliciously, but through privacy-invading misfeatures connected to pushing people to share more.