I will remake string blockis to use up scraps and strips because I don't want to throw a usable size away (though what does get pitched goes into old pillowcases and delivered to our local pet shelter). There are a couple patterns I have made more than once but generally I'm on to the next bright and shiny object. I can definitely see getting burned out on the rag quilts. I think you will have to say no -- or at least put them off for at least a year. Or teach them how to make their own? Have a workshop and bring everyone together (I know - easier said than done).