I've found that anytime someone asks "has anyone else ever done this" - they have! What kind of fringe are you talking about? The part that rags on rag quilts is referred to as fringe, but I don't think that's what you mean. Lots of quilts using fleece are fringed just by snipping the fleece. Or do you want to use commercial fringe, or make your own? The answer to how to do it probably depends on what you start with and what look you're going for.