The JWS cult is one where leaving the organization/religion can cause an enormous amount of grief and personal trauma, because in doing so you are forever seen as an evil one who has chosen Satan and his worldly system of things instead of showing faithful devoted loyalty to Jehovah and his earthly organization.
Active participating JWS will then disrespect you, even ones own family members who are presently active.
The shunning process varies and will depend on if you've been DFed or if there has been any vocal objection about the JWS religion to active members.
In that case the identity as being a blasphemous apostate (evil) is applied to that person.
Sure you can resign but the consequences for some can be quite psychologically traumatic and bothersome to varying degrees.