Most Helpful Guy
Move stuff when they go to the bathroom.0
Most Helpful Girl
to be honest you probably can't.1
dress up as ghost
Get the phantom keystroker.
Plug it into a computer.
It spews random texts that appears to resemble the computer 'taking' to the victim. You can alter the frequency at which these texts appear, from 5 seconds, to a couple of minutes. You will also be able to perform caps lock and other functions.
Move things around subtly when no one is watching