Some people might want to add certain trigger to make their maps more "interesting" I suppose.
Name Spoofer
Events (With the Assumption you have only 8 Players)
Player - Player 1 (Red) types a chat message containing -name as A substring
Player - Player 2 (Blue) types a chat message containing -name as A substring
Player - Player 3 (Teal) types a chat message containing -name as A substring
Player - Player 4 (Purple) types a chat message containing -name as A substring
Player - Player 5 (Yellow) types a chat message containing -name as A substring
Player - Player 6 (Orange) types a chat message containing -name as A substring
Player - Player 7 (Green) types a chat message containing -name as A substring
Player - Player 8 (Pink) types a chat message containing -name as A substring
Conditions
(Entered chat string) Equal to (-name + (Substring((Entered chat string), 7, (Length of (Entered chat string)))))
Actions
Player - Set name of (Triggering player) to (Substring((Entered chat string), 7, (Length of (Entered chat string))))
If you want to limit the number of letters simply add this under conditions;
(Length of (Substring((Entered chat string), 7, (Length of (Entered chat string))))) Equal to X
Where X is the number of letters that you want