Saeth... you are not wrong in that individuals can be df or da for openly associated with a df or da person. I would question you as to what you mean by "force"? The company is telling and individual... if you want to be a member you have to shun... So an individual has to say "i want to be a member therefore I am making the choice to shun this person" If they CHOOSE to shun then they have made a value judgement for themselves that being a member is more important than contact with the person who is to be shunned.
Continuing to place blame on a group when the responsibility belongs to the individual for making their own value judgement just seems pointless.
Your mother/father/sister/brother is making a value judgement that being a part of the group is more important than their relationship with you.
pbrow