A nice example is the company pages on LinkedIn. No company, to my knowledge, publishes statistics on:
- the schools their employees attended.
- the companies where their employees previously worked.
- the companies where their ex-employees work next.
Arguably, information like this was never truly private, but was simply so difficult to aggregate that nobody bothered. As Harr aptly put it, they practiced "privacy through difficulty"--a privacy analog to security through obscurity.
Some people are terrified by the increasing efficiency of the information market and look for legal remedies as a last ditch attempt to protect their privacy. I am inclined towards the other extreme (see my previous post on privacy and information theory): let's assume that information flow is efficient and confront the consequences honestly. Then we can have an informed conversation about information privacy.