I hope we all know enough now not to put pins in our leftover scrap fabric bundles (they rust) or rubber bands either (they disintegrate and get gunky, leaving gunk on the fabric). Ask me how I know. LOL
I rolled the fabric from my sewing projects since I was about 11 years old making stuff for myself, my sisters, and some friends. I had a wash basket full of these in 1990, and decided to "get rid of them" by making a quilt or two. Ha, ha! So now I have many more "wash baskets" full of fabric. There is always just more and more.