I know of three that were DF'd over the years I was in, close on 4 decades, two were for adultery with hot sistas , one was more interesting, he appeared on a national radio programme and faced a number of christendoms finest at the time, a theologion and a bishop if I remember, and made them look silly about the Trinity doctrine, simply because he was very well prepared, but an intellect too.
This was in the mid 1960's , I do not recall his name, but he went for Apostasy I was told, which does not surprise me, he probably espoused the Trinity in the end, if he carried on and researched it properly. LOL