I have a friend who is a beginner stitcher as I am, but she insist that you do not need to stabilize quilted fabric. I told her you do need it so the design doesn't shift. She doesn't want to waste time attaching stabilizer by ironing on or sticky stabilizer. I think she is just lazy and don't really care how the backside looks after stitching.
Can you answer this question for me. I sometime double when stitching lighter weight fabric such as knits and t-shirt fabric.