BEAR5- I understand where you are coming from but....... you said "it is 90% mental and 10% physical" but then the last thing you said was "beat them physically". I am pretty sure you meant "beat them with skill" but if the game is 90% mental then trying to get under the other team's skin would win games, not scoring goals. Also, if the game is 90% mental, then a team of enforcers could beat the best skilled team. The game is not 90% mental and 10% physical, it is more like 50-50.
Yes, players must maintain composure. Composure could mean a player giving up a professional foul, but he better not give up two. It means not speaking to the referee or his assistants. Talking to the opponent is going to happen. I did it when I played in goal and I had players do it to me. The key was both of us maintaining composure. A forward telling the keeper "I'm about to score on your ******* ***" and the keeper saying "no ******* way" is just two competitive athletes jawing at each other. If they both maintain composure then it makes for a heck of a game to play in. I love it when people talk trash to me in my adult leagure b/c it gets me fired up and I tend to play better to shut them up.
If one of the best players on the other team is talking then, if you are any type of competitor, it should get you pumped. If it is the other team's enforcer talking, then you should laugh, get the ball, expose that player's weaknesses, score and then laugh again.