ALL sports, from Grammar school leagues to Professional are discussed each and every day, by word of mouth, computer sites, newspapers, and tv, etc.
All sports fans, players, and coaches have their opinions. Opinions are part of the game, and without these opinions you would not have dedicated fans, To get away from the hectic world we have today, fans find relief in discussing their favorite teams and players.
Yes, it is true that some fans do go overboard. It is fine to proclaim that one player is better than another in one aspect of a sport. It is unfair to state that a certain player is unworthy and should not be on a team.
I have seen past posts on this site that state it quite well: BEFORE YOU DENOUNCE A PLAYER ON THE TEAM, consider that the player you are criticizing is YOUR daughter.