Using Pervasive RFID to Predict Human Behavior
The project tags every object in a given space; each tag captures data and adds it to an XML database. The user can then receive feedback through a PDA, such as "Don't forget to lock the door" if he leaves the room without touching his keys.
In many instances (such as a hospital or nursing home), such an environment would be immeasurably helpful and could save lives. But in others, it could be annoying, invasive and just downright creepy.
Source: RFID in Japan