No member should be pressured into accepting any norm that he or she cannot fully endorse. If any team member does not approve of a proposed norm, eliminate it. If the list of approved norms is longer than ten items try to reduce the list by simplifying and combining complementary items. Make sure all team members are comfortable with the revisions. Adopt the set of group norms.
Norm setting can only work if the team is truly able to arrive at consensus.
Norms won't stick if members have reservations about them. However, once consensus is reached, the team is equipped with a guide that can serve to strengthen positive practices. A set of norms can serve as a common reference if contrary behaviors arise. Finally, written norms are handy for potential members and newcomers who want to quickly get a sense of how a group operates. Norms in hand, a team can move forward inspired and motivated to uphold group principles and confident in the security such guidelines provide.