A commentator on my recent post about the DEA installing license plate scanners on the nation's interstate highways asks, "If you aren't doing anything illegal why would you care if someone captures your license plate number?"

Another commentator countered: "If I'm not doing anything illegal, why do the police need to record my license plate number?"

When a number of bars in San Francisco agreed to install facial detection cameras to collect and broadcast demographic information about the bar's patrons, the local community lashed out – not only at SceneTap, the developer of the service, but also at the bars who agreed to use it. Outraged patrons wrote scathing reviews on sites like Yelp and threatened to boycott bars that installed the service.

The DEA wants to capture the license plates of all vehicles traveling along Interstate 15 in Utah, and store that data for two years at their facility in Northern Virginia.

The big news in the business world this week is Facebook's ongoing Initial Public Offering, where the company is selling shares to the public based on an estimated value of around one hundred billion dollars. [Or, as Dr. Evil would say: one hundred billion dollars.]

Where does that kind of valuation come from?