This rule is kinda stupid cause over the years the Warcraft - Dota has become the flame icon. In some other games if someone flames you just have to say to him: "Stop flameing! This isnt DOTA" and he understands and stops flameing. And why shouldnt it be alowed to swear. Its a team game and team is needed. If some one isnt part of the team yo just need to put him in his place. So why not flame???