Long, long ago, around the time I first started FTABlog.com, I ran an occasional series about what some folks did with old satellite dishes. There were bird baths, squirrel-proof hanging bird feeders, parabolic microphones, tiled decorations, and more that I can’t remember. This video includes the microphone but adds a few more that I hadn’t seen before.
You might argue that this isn’t about FTA, strictly speaking. But I would say that anyone who really gets into the hobby will upgrade to a wider dish one day, and that leaves the question about what to do with the old one. The way I handled one of them was to mount it pointing at one satellite so its channels are available in a snap rather than waiting for a dish motor to turn. Try what works for you!