If you are looking to learn how to legitimately create custom chat features for your own game, you can find official guides on the Roblox Creator Hub. How to Send ROBLOX SYSTEM MESSAGES to Players
: Many "exploit executors" or scripts found on third-party sites contain viruses or loggers designed to steal your account information. FE CHAT HAX SCRIPT
In the context of Roblox, an typically refers to a script designed to exploit or modify the chat system in a way that is visible to all players in a server. "Filtering Enabled" is Roblox's security system that prevents changes made on a player's client from automatically replicating to the server; therefore, an "FE" script is one that has found a way to bypass or work within these constraints to affect others. Common Uses of These Scripts If you are looking to learn how to
: Sending messages that look like official server notifications, such as "[System]: Player has been banned". Using "hax" scripts is a violation of the
: Roblox actively monitors for exploit scripts. Using "hax" scripts is a violation of the Roblox Terms of Use and can lead to permanent account deletion.