These rules have been developed over time and are accepted by most Internet users. This is considered shouting. If you use humor or sarcasm, please make sure it is labeled as such. Don't be afraid to include exactly what you are thinking in parentheses. A smiley is a combination of punctuation marks that look like a smiling face drawn sideways.
Smileys help Internet users express a fuller range of emotions.
Or, you might wink instead. However, use these sparingly. Don't assume that the inclusion of a smiley will take away from an otherwise insulting comment. People are less likely to read your post and respond if it drags on and gets off message. Yes they are.