This doesn't sound like a good idea.
This sounds a little too much like littering.
I always thought it would be cool if it wasn't so hard to send spacecraft to the Moon, so I could send one myself.
But then I realized that it's actually a good thing that it's so difficult, otherwise a bunch of idiots would be doing gawd knows what and probably screwing things up completely in too many ways.
It sounds like that's what these people are planning on doing.
Do we REALLY want to send thousands of pieces of paper-like objects to Mars and scatter them all over the planet? Or Venus? Or the Moon?
"Someone" should probably put a stop to this.