Believe it or not, there are still some who are hardcore against the use of aluminum cookware.
You know those stereotypically hilarious crackpot articles from the Golden Age magazine back in the 30s? I guess some of that fear percolated through a generation or two and still survives among a select few in my congregation.
One of my friends who just got married had a wife who was adamant that Microwaves give you cancer.
I'm an avid shooting sports enthusiast (archery, airguns, powderburning guns) and I had to keep that a secret. On time I got caught on a camping outing teaching RESPONSIBLE gun handling and target shooting to a younger teen in the congregation using a little .177 pellet gun and I got a massive verbal drubbing for it. Even archery is considered a "martial" sport so I had to keep my bow under wraps too.