Sure, but that ruins the ability to just pop into a pub and play with people you don't know (let alone trust). I have this business idea for a pub in a faraday

Sure, but that ruins the ability to just pop into a pub and play with people you don't know (let alone trust). I have this business idea for a pub in a faraday cage that would make cheating impossible for pub trivia (added bonus: also removes any other reason for anyone to be on their phones!)