Don't call the quilt police
I am often very lazy about hand work. Even basting. I had to put together two pieces of my QAYG project. The quilt tops were sewed in, the batting trimmed so they butt against each other. I had to bast the backing fabric from one half over the other so that when I stitched in the ditch from the front, it catches the backing fabric just right and looks clean back and front. Usually diligent basting keeps the backing in place and works beautifully but I was running out of time and patience.
What did I do? I cut up a thin sliver of fusible web - about 1/8" strips and used it to hold the backing in place. All done. Looks perfect.
Please don't call the quilt police!