Except Disney knows exactly who was in the Park that night and where they live, and their ages, demographics. There are very few data sets that can place people at specific locations at particular points within the pandemic, but the Magic Bands can. If their data was shared with contract tracing researchers, it would be a very valuable tool for those trying to track how the infection has, or has not, spread. It could actually be a very important contribution to scientific understanding about the how the infection spreads. If I was a researcher, I would be very excited about trying to persuade Disney to share that data.