Her response was rude, but so was photographing the merchandise and especially the end of the bolt! That's a no-no. Likewise is photographing a sample quilt so that you can reproduce it at home without buying the pattern. This is an independent shop and every sales dollar counts to them. If it was a JoAnn's or Hancock Fabrics, no one would care.
I'm surprised you stuck around and spent $50 after the way she spoke to you.