Some people fell for obvious impersonator scams, and keep harassing me as a supposed scammer who stole their money, and then when I realize that detail, I explain with evidence it wasn't me and highlight the clear fake account that they're referencing, and they actually realize it and stop. (If someone isn't well-off, doesn't have a good information filter, and looses a few thousand dollars from a scam that they think is me, it's natural that they'd devote a lot of time to harass me. So if I see that start to happen over time, I take time to examine it and clarify it, with half-decent results.)
Some other pure trolls soften *slightly* when faced with a human-to-human response, but still have a persistently negative issue. Instead of 10/10 of their comments being negative, 9/10 of their comments become negative and the other 1/10 become semi-consecutive. There are more that double-down than soften, though. And then over time they burn out, because their comments get no likes anyway.
The statistics aren't great.
