In a real golf tourney, players can not help other players, nor can they take a video call. As WGT would have no way to enforce this rule, they don't allow multi-player tourneys. Makes perfect sense to me. Even should WGT allow it, but disable all chat during the tourney, players couldstill communicate via, as mentioned, Cell phone, IM, and a number of other means. Again, since WGT can not enforce what would be cheating, they have chosen the sensible route and made multi-player tourneys a non-starter.