The nature of poker based on incomplete information, which is corrected as far as possible with mathematics, and the analysis of gestures in live poker, seems to me the most representative of poker, if the opponent shows the cards, not It seems moral to me to see them, since that is no longer poker, it is a kind of complicity to let yourself lose, especially if you only show them to one, now if this player shows them to all, it is no longer complicity with an opponent in particular, but that does not represent the intellectual spirit of poker, that represents letting lose or not taking it seriously by the player who shows them, and deviating from the spirit of poker by those who decide to watch, technically, it may not be cheating, I don't know the rules in that case, but morally and logically, that is no longer poker, poker is related to incomplete information and to correct it as much as possible, with behavioral psychology and mathematics, not with seeing cards from others. Now use the google translator, sorry for my bad English in the previous answer, a big greeting from Argentina and congratulations for the site, it is very nice.