It has always taken place when the organization or faith is threatened by the findings or outcome of findings by the person which is essentially contradicting its own stand.

When an organization, cult or its leadership feels threatened from particular person or his group, they immediately ex-communicate him so that his truthful ideas do not reach the other community members, which may further lead to revolt against the system. By boycotting such person, organization wants to teach others lesson that if they say anything, they will be dealt with severely.

By excommunication, the person who was excommunicated becomes emotionally weak, lonely and deserted by his own blood relatives, family members including spouse. This further weakens him economically as people may prefer others over him to avoid ire of establishment, he starts living life of solitude and seclusion.