The facilitator needs to state the tentative agreement carefully when checking for consensus and make sure that folks really are agreeing to the same thing. And most importantly the facilitator needs to protect the integrity of the individuals and the unity of the group. The facilitator has to pull it together after the meeting so the group values its own decision-making process, its diversity, its creativity, and itself. Another danger of consensus decision making is that people who have been raised in our adversarial society will not even be willing to try it. And when decisions don't work, anyone can bring them back to the group for revision because, while everyone is invested in the decisions, nobody has to be attached to or possessive of them.
Decisions never have to be fought for, only worked for.
The danger is that we are so brainwashed by Robert's Rules of Order and parliamentary procedure that we forget we can work things out amiably with the other human beings around us. Eileen Rauzi have come to some meetings. Chuck and Monica's baby is due next month.