If you think you left your account open on a friend's device, use the "Security and Login" settings to log out of all active sessions. Ethical Pranking Tips
There are various websites designed to look like a high-tech hacking interface. You open these in full-screen mode on a target's computer. broma hacker facebook
When searching for "broma hacker facebook" tools online, you must be extremely cautious. Many sites that claim to help you "prank" your friends are actually fronts for real malware. If you think you left your account open