There is a powerful case that shunning breaches the human rights of the vulnerable individuals such as children, the mentally ill and the elderly who may suffer more deeply from the cruelties of loneliness due to the way modern society is structured.
Article 8: And what about the right to family life?
Article 9: Freedom of thought and religion (specifically for apostates in this case).
N.B. Massimo Introveign is an absolute fraud and has to be in the pockets of these cults because there's no way someone purporting to be an academic supporting freedom of thought and belief could champion Watchtower. He frequently outright lies in their defence, too.