I wrote a post before, in which I showed the sinister effects that smileys have on written communication. You can write the most insulting, demented things, but as soon as you add a smiley at the end of a message, it renders it as being completely harmless and cute.
The focus of the last post was insulting others and deadening the effect by adding a smiley. The focus of this one is writing completely psychotic statuses on Facebook, and getting away with it because of a simple smiley. Here are some examples to help illustrate my point (I had to work very hard to make sure that I don't accidentally post any of these on my news feed).