Well, I guess am in the non-gross, cool to reuse group.
I have saved countless jeans (and I mean in the hundreds of pairs) from the landfill. Cutting them up & making usable quilt squares and rag quilts. I have made true friends from my denim square customers from eBay. So the value of the act is more than just the newly reclaimed fabric.
I also incorporate fabric from flannel shirts, khaki pants, tablecloths, chenille bedspreads, upholstery and even old T-Shirts into new fiber works of art. To me it is anyway. It can be a way to show rememberance, incorporating a loved ones items into a quilt, like your child's t-shirts into a quilt for college.
see the pocket?
This one is khakis on the back
I have also used old antique quilt tops & quilts to make new items. I used a quilt top that was rows of diamonds, pieced into large triangles. I used each row to make quilted window valances. I have a good friend that uses old cutter quilts to make primitive looking Santas (gorgeous-I have to get a picture for you all).
So I am a firm believer of not throwing things away. and if you saw my eclectic stash, you would believe me. I try to pass on the recycle/upcycle to those that embrace it. I have already exhausted all my denim stash from summer yard sales. BUT I will continue to offer my crazy pieced denim blocks forever (most likely, since I have such a collection of scraps). Here's the back of a rag quilt I made using them.