[anoncake]

> it neglects to mention that using Facebook and entering into a contract with Facebook is optional.

In theory, not always in reality.

[encom]

This is true.

I talked with a fellow electrician friend of mine: At his job they're organising their on-call rotation via Facebook. I was horrified. Refusal to use Facebook in this situation would be very difficult. I very much suspect this situation is not unique.