Reality mining is the study of human interaction based on the usage of mobile phones and other portable computing devices like tablets. According to Bloomberg Businessweek, researchers say can get a more accurate picture of what people do, where they go, and with whom they communicate from a device they carry than from more subjective sources, including what people say about themselves. There is some interesting reading on reality mining especially the benefits on the Bloomberg Businessweek website.
But like all good things in this information age the issue of privacy comes up. It is very important for people to that information is being collected about them. As more and more people nowadays use mobile devices, any information collected becomes very useful and could easily be abused. It could also be put to good use. Just remember that if you have a mobile device, your every move can be tracked.
See how the American military is using reality mining in Afghanistan.