I had a thread made about me, it was horrendous. Not to mention complete lies. MN tore "me" to shreds. I'd even posted on it, ironically asking her to talk to her friend in case they had been misunderstandings.. I found out after they literally threw it at me as proof of what a worthless bitch I am (amongst other things I was called). She was full of glee to tell me she'd been right about me all along.
Despite knowing it wasn't true, I was devastated. I'd trusted her with things I'd told no one and she then turned it into malicious gossip about how I was a pathological liar amongst other things on here and it ran to pages, there was even another thread after she'd confronted me.
I ended the friendship. I only told one person, because they saw me afterwards and I was devastated and they said they'd tell no one and not to worry no one knew it was me and they kept their word. She on the other hand spurred on by her thread(s) told everyone. She kept trying to be my friend all of the time after, phoning, coming round, leaving gifts and cards then bitching about me not taking a hint, trying to "suck her back in". It got to the point where she would slag me off to anyone. BUT I'd told no one, she assumed I had, and the people she was telling this to unlike on MN actually knew me.
She's still here. Posting about me every now and then. I know her username. She told me it was safe to post here as I'm not and never will be a mum so I wouldn't be allowed 🙄
It did teach me though that what people post about others is simply a point of view.
But yes, sometimes these things spill over into real life with real life consequences. Not trolls but others. Also it's one point of view, or in my case a view which was utter rubbish designed to hurt as much as she could.