So do flashlights, refrigerator magnets, and electric toothbrushes, but I'm not afraid of them, either.

There are other reasons to dislike MMW and opt out of the scans if you so choose. You shouldn't base your decision on misinformation and baseless fears, nor whould you spread those fears without any science to back them up other than the blanket statements we've seen here ad nauseum about "we just don't know!" and "there's never been a study done!". RadioGirl has posted the science behind the safety of MMW scanning multiple times over the last few years; she knows it extremely well, since that's her chosen field, and I'm satisfied that MMW poses no health risk even with repeated scans.

The point was the same as most things TSA does - to establish that they are "doing something" about the problems TSA has with the traveling public, even if that "something" happens to be completely useless, wasteful, or more harmful than helpful.

This particular episode allows TSA to say that they made a good-faith attempt to start a meaningful dialogue with some of the primary stakeholders in aviation security - frequent fliers - and if challenged they will undoubtedly say that the effort was met with hostility, complaints, bashing, and rhetoric, and blame its failure on US rather than on their own bankruptcy of real information and lackluster participation in the process.