The society rarely phrases its man made rule as thou shall or shalt not, but makes "suggestions". The elders of each congregation will then enforce those "suggestions" to a greater or lesser extent, depending on the demographics of each elder body. The inconsistancies result in uncertainty and that in itself becomes an additional form of control.
It is possible for someone who has only experienced only one or two congregations to read someone elses experience on a site like this one and may think, that does not happen in the organisation. The truth is, it may not happen like that in your congregation, but it may very well happen in another congregation. This is entirely because,the rank and file are instructed to listen to the elders without criticism. The elders in turn without clear direction can interpret suggestions in any way they feel is appropriate. Those elders can then create a set of bye laws unique to their congregation.