I think a warn command would be cool
example:
Blockhead666: lolz guiz im gonna spam
*Blockhead666 spams!*
Host: Blockhead, please clear your bricks.
Blockhead666: NU!
then you go all like
/warn Blockhead666 Spamming
and on the chat it would say in like, red or something
"Blockhead666 has been warned for "Spamming" - Warning 1 of 3"
and at the 3rd warning they would be kicked (maybe this could be changed...?)
it may be useful for people who don't want to just kick or ban