[Jake177]

I think there are two major factors that have contributed to the paper airplane "tradition".

1. In order to avoid getting stuck in the nosebleed seats, teams begin filling the Einstein stands well before the closing ceremonies start.
2. Given no other source of stimulation, most people find making and throwing paper airplanes to be an enjoyable way to pass the time waiting for closing ceremonies to start.

I think the easiest way for FIRST to discourage this practice is to address one or both of these factors.

1. I don't think it is wise or practical to try to keep people out of the Einstein stands until closing ceremonies are ready to start.
2. Give people something else they can pay attention to during this time. - What about a feed of the division elimination matches on the Einstein screen? Once those are over, why not have an Einstein Pregame Show with a recap of the division elimination rounds, and a run-down of the teams in the Champion alliances?