Taking part in a game. Taking part in a game manifests a willingness to submit to such bodily contacts or restrictions of liberty as are permitted by its rules or usages. Participating in such a game does not manifest consent to contacts which are prohibited by rules or usages of the game if such rules or usages are designed to protect the participants and not merely to secure the better playing of the game as a test of skill. This is true although the player knows that those with or against whom he is playing are habitual violators of such rules..