enoughisenough, no I have no idea, but now I do. I have been there. Yes, when I brought this up to an elder with my mother sitting there listening (I was over 18 but she felt I needed another person there), and he knew it was happening and said he would discuss it with the woman's elder husband. Nothing happened by the elders, and I had that "private" marking come up several times over the years about my "sin" that was nonexistent in that case. I asked the elder why they had not approached me if they believe it because it was a disfellowshipping offense....!
He had no answer. My first experience with the good ole boy's club, and not the last. As to marking others, perhaps for me as an individual, but telling others I had marked that person and that they should do so too to protect their family from contamination, no, never. I learned from my own experience how deadly it can be.
(PS I have used the pearls before swine reference, quietly with many an elder)