It's probably because most trolls don't really understand the people they're pretending to be lol. They can't properly mimic sincerity most of the time because you have to be a specific form of fucked up to entirely understand someone (as in, fully comprehend their motivations and existence on an emotional level) and still want to make fun of them in that way
![[CW animal abuse] Drone Rights' solution to the "obligate carnivore"/outdoor cat problem](https://hexbear.net/pictrs/image/0d4bee14-d819-4970-b746-537f31420b97.png){kind=link}
You are correct, and thankfully most of the attempts at nefarious engagement/other ulterior motive slip up rather quickly.
It's probably because most trolls don't really understand the people they're pretending to be lol. They can't properly mimic sincerity most of the time because you have to be a specific form of fucked up to entirely understand someone (as in, fully comprehend their motivations and existence on an emotional level) and still want to make fun of them in that way