I think people use whatever they have on hand, especially if you have run out of your favorite stabilizer. If your machine is happy with it and you are satisfied with the results you get, there is no reason not to. However, the needle will have a tendency to cut the filter as its fibers are different from ME stabilizer. I'd check for increased lint in the sewing machine as well. If you have a newer machine, I'd stick with the stabilizers made for ME as they the newer machines tend to be more sensitive and you don't want to wreck your machine!
Somebody asked the same question many years ago and the majority of the answers were negative: Better not, as coffee filters are not made to be used for embroidery. I'm using water-soluble Vilene and the result is always great. They are selling it in rolls or by the metre (or yard, depends where you live).
I did try it a long time ago and also one time when I ran out of stabilizer. It did work but kind of linty and not made for that and I think in the long run it would be much more expensive. I send for my on a big roll now.
Are they even large enough to hoop??
YES I HAVE SOME BIG ONES THEY ARE ABOUT 12 INCHES AROUND
No sorry but as I don't use coffee filters I haven't got any in the house. I have used weed suppressant though very successfully
no I never tried, and probably will never do....
Maybe in an emergency, but overall I agree with mrskiki. We spend lots of money on our machines and expect our designs to look perfect. Why use items not intended for embroidery? (Confession time: I did use a dryer sheet once while at my mother's because she had run out of stabilizer.)
I have seen a posting where a Cutie in a far distant place used them because of the difficulty of acquiring stabilizer in a hurry where she lives.