To block a player in the world chat:
- Click on their message.
- choose “add to blacklist." 
 
-In case you want to unblock a player, click on the blacklist icon in the top right of the world chat screen, then pick the desired player and click remove. (The maximum number of players you can block is currently 30.) 
-To block a player in the alliance chat or private chat, simply click on that player's photo and slide the button near the "blacklist" icon.
-You can also report violations, as commanders can mute players in the world chat for a certain period with this feature. When the reports reach a specific number, the system will mute that player automatically. To report a violation, simply click on the offensive chat and then choose "report violation.