Just keep in mind however that things can happen in a chat just as they do outside. Just as the name implies, cheating can happen on a computer just as in real life.
Or if you want to do the asterix technique instead in an IRC chat you can do that also.
It depends on the person's preference of doing their actions.
Try not to yell, this is where you either type in all capitals or use text editing to increase the font size and bold type of your message.
In IRC's you can only type in all capitals, there is no text editing.
For a much bigger list the WBS Chat Book has a whole list compiled from various users from all over including various smileys!! If you choose you can use text editing to increase the size of your text to catch someone's attention.