sorry, allan: that's not the case. if a decision-making process is by "consensus", ignoring or overruling the wishes of *any* one person, then by definition is is unethical. there is a fundamental and in many cases pathologically-held belief that is unfortunately ingrained into western culture that "democracy" - majority voting - is acceptable. the reality is that *by definition* it's fundamentally unethical.
How can any decision-making process meet this requirement? There are often conflicting desires between different members of a community. In such a case, making *any* decision will have overruled the wishes of at least one community member. Democracy at least lets everyone express their wishes, rather than having e.g. a dictator that makes decisions regardless of the wishes of the people under their jurisdiction.