@NH. What they are using now is designed to help the Pentagon perfect AI for drone strikes, as well as give Google better ability to identify what it sees with street view.
Their text captcha was used for making OCR more accurate, scanning books. Now it's about identifying cars, the data for which is fed to the Pentagon.
There are many criteria you can use for choosing a secure operating system. This includes everything from the features explicitly supported to the overall goal of the system itself. Although this answer turned out rather long, it actually only touches on a small subset of considerations.
If this...
Why do crazy people gravitate to security-related discussions? Like this example from a mailing list about Tor... It's both hilarious and kind of disturbing.
> For the last 8 years I have been experiencing unwanted communication. For the last 3 years I have been able to communicate without using my body. Any information would be appreciated.