Whether you like it or not, technology doesn't happen in a vacuum. Technology relates to people and society in a big way.
When usage of a device (like the millimetre wave scanner) is misguided and unappreciated by a large number of people, why on earth _shouldn't_ it be discussed on a tech forum?
It's not enough to take the view that 'I just make the stuff .. other people can choose whether it's a good idea'.
We all have a responsibility to consider whether what we create is going to result in anything 'good' and what 'good' actually means.
http://www.google.com/search?q=site%3Anews.ycombinator.com+i...
.. or are you claiming you only express facts ;)