[Avi]

A warning system would be beneficial(I think they discussed this for ttt at one point). I would suggest AWarn2 for the features it has and what you described you wanted. You can warn them via a menu, and the player sees the warning/reason in chat. You can also see a log of all previous warnings a player was given. It also allows you to set up a feature where if they get so many warnings in an amount of time it will temp ban them. 
Otherwise these seem to be some pretty good suggestions.