I have a couple of rolls of painter's tape out in my sewing room, kept there just for the purpose of the quilting lessons that I give periodically. I teach the student how to measure and place it, then show them that it doesn't leave a mess behind as part of my lessons. I also stress the "needle up, hold thread behind the presser foot" thing, but I don't know how well that goes into their learning processes. I have a cousin that I have showed this process to at least a dozen times, and she still screws up her FW every time she uses it. And this process was taught to us by the same home ec teacher back in the fifties. I just shake my head, roll my eyes, and show her again.