The smilies help a lot more than you might think. Reading a post is different from talking to someone in person. When you read a post, you don't get facial expressions that you would otherwise get in person. Those expressions are important because the same thing can be said but mean two completely different things based on how it is said. The smilies basically help people when it comes to sarcastic humor or anything else that could be taken the wrong way. In a similar sense the smilies can express an added sense of passion. If I get hit in traffic, the upset smiley will mean I'm really upset...not just posting about it for fun or because I'm bored.