They both need to get fired: the thief because you don't mess with people sandwiches and the sandwich owner because... How can you trust an employee when they think that comic sans is the suitable font for this situation?
blackmail -- the action, treated as a criminal offense, of demanding money from a person in return for not revealing compromising or injurious information about that person.
extortion -- the practice of obtaining something, especially money, through force or threats.
the difference -- blackmail is threatening with revealing info, extortion is by force or in this case threats (eating that guy's sandwich in this case).
extortion -- the practice of obtaining something, especially money, through force or threats.
the difference -- blackmail is threatening with revealing info, extortion is by force or in this case threats (eating that guy's sandwich in this case).