I just had a laugh... I sew clothes for my daughter from patterns I purchase. She "displays" them every time she wears them out in public. I didn't get permission from the pattern designer for that. Guess clothing is different?
If we cannot take a pattern, use our own fabric and color interpretations and feel like it is "our" creation when we get to the final project, then I feel like I should be asking microsoft permission every time I show a powerpoint slide show because I used their templates and "patterns" to make the shows, even though all the information is mine. Pattern designers might as well be the owners of my quilts then because I don't have the right to even show them off.
If I paint Donny Dewberry flowers on a shelf, do I need to get her permission to sell the shelf since the flowers were painted by using her book as a resource?
Why on earth would ANYONE ever want to buy a pattern to make something if they could not really call it their own to do with it what they wanted? How incredibly frustrating.