I think the article which started this topic is no more than the OPINION of the author.
While she may have had some success in protecting her copyright I think she is wrong to say any quilt made from her design cannot be displayed publicly without her permission.
What is the purpose of making a pattern if you don't want quilters to buy it and make it?
I also think it an error to make it a sticky as that implies it is the "final word" or is more accurate that other information found here or on elsewhere.
I do always enjoy the lively discussions that the topic of copyright creates!