When driving and observing the rules of the road, we should do the same as we travel through cyberspace. To personalize your messages, you can use smileys, also known as emoticons, expressions you create from the characters on your keyboard.
Some people pay for Internet access by the hour.
The longer it takes to read your messages, the more it may cost them. This is true whether you post messages to a newsgroup or a mailing list. Keep in mind that anything you post to a newsgroup or type into a chat session is a public comment. You never know who's reading it, or who may copy it and spread it around. If you're posting a message to a public bulletin board, forum, or newsgroup, stick to the topic.