I agree with Vauxchen-kun. When I chat with my friends I can't merely say sup? or lol; I also understand why it is that long. It keeps people from merely posting lol as a response to something in a thread which is just spam if you ask me.
When it comes to the sigs, three pictures even if they are within the rules, is actually a lil big. LoD's sig is a good example of that.