Facebook has just patented a new technology that allows it not only to track where you go, but to predict where you might be. The new technology, called “Offline Trajectories,” will track you,based on where you have already visited.
The technology can reportedly use the strength of NFC signals from cell phones, Bluetooth, and Wi-Fi.

A spokesperson commented on the patents, saying “We often seek patents for technology we never implement, and patent applications — such as this one — should not be taken as an indication of future plans.”