There's some info about behaviour detection here: http://en.m.wikipedia.org/wiki/Predictive_profiling http://en.m.wikipedia.org/wiki/Predictive_profiling It's

There's some info about behaviour detection here: http://en.m.wikipedia.org/wiki/Predictive_profiling http://en.m.wikipedia.org/wiki/Predictive_profiling It's been used by Israeli airport security and, if done properly, isn't based on ethnics or appearance. I don't think it's a bad thing as long as it's just used for screening. However, the original account indicates that the questioning went far beyond "non-intrusive questions".