Quiet!

This mod provides a mute command for multiplayer games. You can mute a specific player and set the mute duration using the command /quiet. The mute levels are as follows:

• LOWEST: Accessible by any permission. The muted player’s chat messages will become a “hidden message” only in the command sender’s client, but the sender can still click it the see the content.
• LOW: Accessible by any permission. The muted player’s messages will not be displayed in the command sender’s client.
• NORMAL:  It requires level 3 permission. The muted players’ messages will only be visible to themselves on their client.
• HIGH: It requires level 3 permission. The muted player will not be able to send chat messages, but can still send commands (Of course,  /say and /tell 's content will not be shown to other players).
• HIGHEST: It requires level 3 permission. The muted player will not be able to use the chat bar at all.

To cancel the mute, simply send the command again with a mute duration of 0.