For Jhine:
The JW mindset is a strange blend of a religion and corporate culture and is often embraced by people who function well under high control and tend not to question. The mindset leads to a herd mentality on the one hand and a legalistic approach on the the other.
The JW mindset is a natural byproduct of a religious organization that started as a business ie a publishing house. And over the years has blended it's dogma with a corporate culture to an extent that makes it difficult to separate those things. Higher Education and critical thinking is discouraged, personal grooming is also controlled to a surprising level as are certain medical treatments.
The JW mindset is also embraced by people who prefer order and marching in step.
The JW mindset for others is that raising in the ranks by becoming an Elder one can exercise considerable control in the local congregation (the rank and file) as long as they are 'company men' first who will support the WTBTS policy/dogma even if they recognize that the policy or instructions are wrong. Being in control, keeping control be it a discussion, debate or from a position of authority within the organization is considered the proper mindset.
One could say the military, the Catholic Church with it's priests, the Mormons and certainly the Amish etc. all have cultural/traditional mindsets that incorporate a lot of the above.
Used on this forum it may imply that one is not thinking through an issue sufficiently because they have a JW mindset and are not using critical thinking skills. Or simply believing the same old stuff without questioning.
It can also be applied to someone who is not interested in considering what the other person is trying to get across as in a legalistic Elder dealing with a rank and file.