One of my muggle daughters planted birthday party items all over a 1.5 mile distance and had me gathering the things I needed for the party (hats, favors, silly dress-up stuff to wear while I was caching, etc). It was a ton of fun and clever on her part. It would have made it easier for her if she could have used this concept. I see lots of fun potential, and am glad they are trying new things. If I don't like it after I try it, I don't bother with it again. This attitude also helps me just have fun without scrutinizing the efficacy or point. Different strokes...
