<i>These event-type synchronous, broadcasted human chemosignals open the possibility for objective and non-invasive assessment of a human group response to stimuli by continuous measurement of chemicals in air. </i><p>I don&#x27;t agree that this isn&#x27;t invasive. In fact, based on the current heated discussions going on regarding societal and corporate responsibilities around privacy, I don&#x27;t believe I&#x27;m in the minority on this one.