The creator acknowledged this possibility [1] (fwiw it appears they do use accelerometer data to discount obvious false hits), but mentioned that they hope to i

The creator acknowledged this possibility [1] (fwiw it appears they do use accelerometer data to discount obvious false hits), but mentioned that they hope to include a proximity detection circuit in the multiplayer adapter so that scoring will be more honest. [1] https://www.kickstarter.com/projects/levelup/sabertron-foam-sword-play-with-wireless-electronic/comments?cursor=5774111#comment-5774110 https://www.kickstarter.com/projects/levelup/sabertron-foam-...