Never!!! No darts. I agree with several of the other people on this list - if you measure correctly it should be wavy, if it ends up wavy, take it off and redo the measurements. Also, I agree with making charity quilts too fast. Your work should always be as good as you can do. If this was a professional quilter, she should have told the person who brought it about the problem, and then told her it needed to be fixed properly by whomever. Sloppy just doesn’t cut it with me - I’m nowhere near perfect but I do the best I can and redo something if it looks really crappy - like wavy borders.
Sandy in Mooresville, NC