Where did you get that "troll" means pedophile, rapist or murderer?
I know only of the mythical troll, which i find not very insulting, like getting called a gremlin or whatever.
And there's the internet troll, which just uses the internet to harrass people, but without raping or directly...
Another trait of trolls is being repetitive.
"Look, i can just copy and paste the same bullshit and death threats to make fools online type walls of text + gifs.
Over and over."
Very clever.