What kind of climate do you live in? I don't think you have to worry about insects if you are in a dry climate or a cold climate. I've always thought silverfish and the like were more of a problem in moist, warm climates. I personally wouldn't worry about it at all for wallhangings. All of my quilts get washed before use anyway, so that's not a problem for me either. I do not starch fabrics before I am ready to use them, but this out of my consideration for eliminating unnecessary labor rather than because insects might become interested in my fabrics.....