Can anyone point me towards a rule, if it exists, that says spectators may not hold other players' hands? And by hands I mean their cards in hand, not literally their hands (although that would be weird too). At my last prerelease, one of my opponents would hand his cards to his friend sitting next to him, and I told him I didn't think that was allowed. He asked why not, and I said it could be construed as coaching. I didn't want to come right out and say "Because it looks like cheating." Thanks.