What annoys me about some of the bag patterns I have seen is the fact that, in several cases, I have identical bags in leather or canvas that I have owned for many years.
Did the designer get inspiration from the leather or canvas original? If so, he/she is certainly not giving any credit for said inspiration. If I make a fabric version of such a bag, how does one distinguish between a copy of my own bag and one made from the quilt pattern?
I have no problems with someone copyrighting specific instructions and making money off their patterns that way. However, in most cases, there is nothing particularly original about the actual shape and overall design, so restrictions on the sales of items made from such patterns just seem ridiculous.