“If people were to accept the existence of a government, then they must be the ones choosing it”. This simple idea became the foundation of democracy. Everything that we have today in the form of democratic systems is, built on this idea.
The short answers is, it depends on the person to join or criticize JWs or any other institution. An important separation between the institution and the individual should always remain in the mind of the observer. The difference and the connection should be a constant, and an obvious fact.