Hi, I'm new here. But, I have been watching this forum since last year. There are some questions I would like to ask. Is it appropriate for player who win the rally to celebrate when the opponent makes an unforced error? Is it necessary for player to apologize when he/she wins the rally by lucky net cord? Is it appropriate for player who win the match to celebrate when the opponent is playing badly or having an injury? Does the player need to play beautifully to make badminton more interesting? Is it acceptable to perform fake racket swinging? To what extent does the player can protest when there is a bad call? Sorry if I ask too much. But, I just want to know your opinion.