Hehe. I suppose you could use one similar to the one I have that counts smiles, frowns, and laughs in the channel. Basically, I have a dialog where you enter the characters to count as a smile, frown, or laugh and then is will track those. Instead of tracking them, you could make it kick them instead.
Or, you can just make a text file with the smiley combinations in it and kick if any of those are in the text. There are various ways you can do it.