No matter what your position on the "legality" of the designer's statement, why on earth would you go out of your way to confront a seller at a craft show and virtually accuse them of stealing from the designer? What a hurtful thing to do! Re-read some of the threads posted here by members who have had the quilt police criticize them for one reason or another and see how such actions affect people. You did the right thing...walked away.