Aieee! Right on the heels of one update comes another. This plugin allows the server to intercept chat from players and print a response, such as "friendly fire", "admin", and other phrases. It is fully customizable to fit your preferences, just open the script. I've added slaps in addition to a server response to certain phrases. You will need to compile it before using it, of course. 

Enjoy!

Thanks to...
Sank for lots of help (and code)
Kendokan for the idea.