Talking with allies is a must because for either side to win they have to have a plan. You can’t just add lib the entire game and expect to win. As for talking to other players that is just the fun in the game. Make them second guess their moves.
Also when we play with newer players both sides offer good advice. Now that being said while it may be good advice its not always the BEST possible advice for the situation. Its still a good and valid move though.