I guess the important thing is to read all the rules before entering a quilt in a show for judging. If you see things you like: cannot have won a prize on this quilt to enter, separate categories for professional....then enjoy putting your quilt in to compete. As for big designers/professionals entering in local shows, I think they have as much right as anyone else unless the rules state otherwise. If a person blogs their progress on a quilt, I think they leave themselves open to getting their idea used by someone else before they are finished.