I've had students ignore me and get Kodak 400CN to use in class. They try to develop it in D-76 with very poor results. It has the typical orange mask, and the negatives are very thin and extremely flat in contrast.
Happens regularly here, also...and one of the first things they say is "There is something wrong with the chemicals!"
At least with LF landscape, a bad day of photography can still be a good day of exercise.