Maybe I'm not getting it, but we seem to have two concerns here.

One is honesty. People who are selling synthetic for wool.

The second is perceived safety. I say perceived, because the intelligent user of anything can use it safely!

I have both wool and man-made kilts. Both have their uses. Man-made fabrics have enabled me to have many more kilts in my closet than I would have other wise. Heck – If I had to stick to wool, I probably would only have four kilts in all.

???