PM- Fish hair is good, durable stuff. I use it for surf candies when I don't have any ultra hair around, and it seems to stand up to the teeth of bluefish better that bucktail on a few of my small juvie patterns. I agree with Striblue that you should hang on to the stuff and give it a whirl. Your point about use in pike flies probably has merit as well.
I agree that it's against the nature of a tier to throw things out. You never know when a material might be that one key ingredient that's needed for a new pattern.