I still firmly believe that any TSA employee who doesn't want to be a part of this should refuse to, just as any traveller should refuse to go through the machine. But, there need not be drama. In fact, I'd say that refusal without drama and in public has a more powerful effect than any verbal argument might.
The lack of self-righteousness in the story was extremely refreshing.
As the author said: "Information, properly delivered, is power." Emphasis mine.