Did any of your families ban Proctor & Gamble products? [en.wikipedia.org] I remember my parents would buy Ivory soap because it was the soap that floats. Which is a P&G brand. When my grandma heard about that she told me they worshiped the devil! This would have been in 1997 or so. I think my (christian) dad still buys Ivory lol. There are other reasons to boycott Proctor & Gamble though.
That first came out long before 97 - you just had the internet. Grandma probably remembered from the 70's or even earlier.
Yes, I added the link because after looking into this I noticed the year the rumor began was in the 80's.