Casual abuse of an innocent service?

Recently, some friends of my wife and I came to visit us. In order to do so they flew from their home city to our quaint little city. Yes, yes, I know, boring details . . . anyway . . .

One of our friends, we'll call her Wynona (all names changed to protect the innocent), has a tendency for eccentricity (to say the least). It seemed that when she showed up at the airport she was carrying several commemorative and/or collector lapel pins. So far nothing too unusual, right? Well, Wynona, fearing the almight wrath of airport security, was concerned her pins might cause a disturbance. With some quick, and odd ball, thinking she went to a gift shop and purchased a few envelopes. I'm sure you can guess what she did from there . . . yes, she proceeded to post the pins back to herself. To add some irony to the mix, once she boarded the aircraft the attendants handed out collector pins to the passengers . . . hmm . . .

So, I ask you all: is this an abuse of the Postal Service? Does a small touch of irony always strike when most needed? What would you have done in this same situation?