If the quilt is for a customer, they have complete freedom of choice. If you don't think the fabrics will work together, it's your responsibility as the quilt maker to help guide their choices. What if you don't say anything and then the quilt comes out just horrible looking? Partially your/my fault, as we didn't make good suggestions to our customer. There are good ways to help them select fabrics they like so that the quilt will come out nicely. It's part of the design process...and it really is our responsibility for the finished product. Just my opinion....but just sayin'!!