Just read this and liked it. Most people I know that this should speak to (well it should speak to everybody, but a specific group) wouldn't like it because it comes from one of the architects of the World Council of Churches ecumenical society, and that is just blasphemous huh. Well I like Temple's wisdom so here it is:
If we have any responsibility for one another's spiritual welfare we cannot, as a rule, meet that responsibility by methods of ostracism. There may be some cases where action of that kind will be effective in stimulating conscience for the first time. There will be far more where such action will have the effect of merely making the offending person resolute in his resistance to moral claims. You will merely put his back up.
William Temple, The Preacher's Theme To-Day, "Christianity, Ethics, Politics" (London: Society for Promoting Christian Knowledge, 1936) 72.