You are so right about cuss-filled public health announcements. There is a huge pedagogical value to swearing - especially if it's extremely rare (once a semester, maybe twice is a good rule of thumb) and used to highlight something extremely important. It could be a good way to signal how important a public health threat is - f-bombs for smoking and obesity, for example, "darn" for not eating enough veggies, and no swear at all when they talk about how one study of ten subjects might possibly suggest that doing crossword puzzles could prevent autism in some people.
Now I remember Jim Butcher. I saw the cover for one of the other books in the series, and it had 「マトリクス」 written backwards on it. That was when I decided I was done with Jim Butcher.
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