It&#x27;s best not to take moderation too personally around here.<p>It&#x27;s pretty easy to damage DNA molecules in vitro, just as it&#x27;s easy to kill cancer cells when they&#x27;re not attached to people.  In living tissue, the more alarming RF exposure studies all seem to be very difficult to reproduce.  In any case, on a milliwatts-per-square-meter basis, the exposure levels used in airport security theater are very low compared to what tends to be used in studies.<p>Note that I&#x27;m not defending the use of these scanners, only their mechanism of action.