Fair! I was going to go back and edit, but my comment was more for other people who read your comment thinking it was a good idea for them to do (assuming they can raise their hands over their heads).
In any case, it's legal to opt-out of the scanners, so why would they care what method you use (really what language you use) to indicate you'd rather get a pat-down than go through the scanners? Either way you're complying with the law.