I want to go back to this with a new angle:
Like a Titan of Industry, ffery's posts and mere presence in a game can warp the play of the entire player list to and fro. Her unique approach to the game makes her a player that scum fear; and town rush to sort.
"Trajectory" is by no means a word or ability of ffery's invention, but she is by far the largest priest of that church. She really brought trajectory-based scum hunting to the forefront in her initial year or two of play. To this day you will see players that have past games with her using both the term and the approach.