If I were running the religion, rather than placing myself in and enforcement role,my purpose would be to be of assistance to anyone wishing to develop or maintain a personal relationship with God. I would teach from the platform whatever I though the Bible had to say and let those in the audience apply it in their lives as best they could or as they see fit. If they needed help in reaching their personal or spiritual goals and asked for my assistance, I'd offer it to them.
If there were certain ones who were living lives that were blatantly contrary to what was being taught, they'd be welcome to attend but to avoid any conflict of interest, I simply wouldn't use them in the program being taught from the platform or in any capacity where it seemed as if they were representing the Congregation.
As it is in the rest of life, rather than infantilizing the members of the Congregation with rules, policies and regulation, they would be allowed to use their own "Bible Trained" conscience and personal discretion to decide for themselves who they associate with in the congregation or anywhere else in their life.