There's a problem with launching the 100 paper airplanes from the ISS. Just shoving them out the door won't make them fall. They'll still be in orbit around the Earth for a long, long time until their orbits decay enough to get them to the atmosphere.
If the ISS is going 18,000 MPH around the earth, the only way to drop them down immediately is to launch them backwards at 18,000 MPH to counteract the orbit speed. Then they'll be going 0 MPH and immediately start to drop. But that kind of feat is nearly impossible.
So it seems that if he does launch the planes, he'll just be adding to the currently orbiting trash and causing more danger for satellites and the ISS.
If the ISS is going 18,000 MPH around the earth, the only way to drop them down immediately is to launch them backwards at 18,000 MPH to counteract the orbit speed. Then they'll be going 0 MPH and immediately start to drop. But that kind of feat is nearly impossible.
So it seems that if he does launch the planes, he'll just be adding to the currently orbiting trash and causing more danger for satellites and the ISS.