Facebook Blackmail
Stealing a friend's secrets from their online life and then using them like a weapon in a fight.
Your friend posted about a fight with their mom. You message them: 'You’re a brat. I saw it.'
Your friend shared a picture of them crying in the bathroom. You say: 'You’re a crybaby. Everyone knows.'
Your friend posted about missing a flight. You tag them: 'You’re a mess. I know.'