Gets to choose 10-20 (or more) words and replace them with other words for a player, so the player sees what he types but everyone else sees it with the words replaced.
For example, the hacker can choose:
RED BLUE
sheriff skyping
sk jester
Suppose a player is a sheriff and he finds that red is an SK. If the hacker targets this player, then during the day, the sheriff might say:
"RED is sk, I'm sheriff"
but everyone else will see:
"BLUE is jester, I'm skyping"