Nice to see that "swatting with badminton rackets" isn't endangering them enough to make the article. As someone who was raised in a firefly-dense rural area, let me tell you, the thrill of the bioluminescent sparks is the closest I got to cocaine as a kid.
I was born in and spent most of my life in the bay area before moving to Kansas City over 10 years ago (long story).
Seeing fireflies for the first time, in my 30s, was (and still is) magical.