I've known some pretty trolly trolls.
Angryskul had a leather jacket which had the troll face painted in the back with ABT (Always Be Trollin) we worked together. He's also been a FreeBSD committer, worked at Apple, Yahoo! and more.
Long ago in idlenet days, I would idle on #bantown and got to know many of its other regulars (e.g. weev) offline too.
AFAIK, they never drove anyone to suicide.
Many were just BOFHs.
Somehow, trolls got much worse and way less technical over the years.