I know of a case where the PO was having an affair with a publisher's wife. Many of us did not know about it though. Suddenly we had 2 new brothers start attending our Hall - one from the congregation to the east of us, and one from the west of us. They were elders and immediately started giving meeting parts, conducting book studies, etc. They said they were asked to come and help us cover our territory, and left it at that.Within a couple of months the PO was df'd and 2 other elders were removed; all 3 of these moved away. A year or so later the two elders from the neighboring congregations went back to their own Halls.
Here's an example of a MS being removed by the Society: Me. When I was a "prominent" MS, I befriended an elder in another part of the state who also served as a substitute CO at times. This elder invited me to share in various aspects of the ministry with him in his area whenever I visited him. My own elders had mixed feelings about it, and said basically, "Well...as long as it doesn't take time away from your responsibilities here...we need you here.." but they never specifically told me NOT to. (I have to point out that at this time I was single, giving public talks and doing many things in the circuit, working 50 hours a week, and putting in about 26 hours a month in the ministry and sometimes aux pioneering.) Some time later I found out that this elder friend and my current CO had been at odds with each for a some time. Each one would talk bad about the other to me and each told me not to listen to the other. Eventually the CO told me specifically to "tell [elder and his wife] goodbye'" and that Jehovah assigned me to serve in my own territory. I continued anyway, visiting this elder friend and his wife and going in the ministry with them. My elders were aware of this. Then the CO's two years were up and he moved on. Afterward my elders told me they received a letter from the Society instructing them to remove me as a MS immediately. I did not lose any other privileges; I could still comment at meetings, be in the ministry school and so on. The elders told me they did not want to do this but since it came from the Society they had to, and that they would inform the Society that I showed repentance. "whatever"