After reading about the netiquette rules, one may think that a few guidelines, as in any civilized society, can help to avoid chaos amongst "netizens". However, having clear the starting point, lack of visual-gesture contact, is very important as to be sure on what is being written (meant) by taking into consideration those who are to read one's message. That is why, writing carefully is extremely necessary because, in this case, it is almost entirely the only way to get your message through. Eventhough, the use of emoticons have pretty much helped to satisfy the demands to fill this gap. Moreover, analysing the rules a bit, words, such as, remember the human, respect, help, share, be forgiving, act accordingly, think twice, give credit, be responsible, and so on, show more or less the posture one should maintain when writing on the net. So if a teacher of English is going to use this tool for his/her class, not only is the learning of English vocabulary, grammar, writing, etc, going to occupy a great deal of the class but, also, the appropriateness and idealness of it's use in order to accomplish effective communication.
"Teaching: more than just lecturing" (Roettger, Roettger, Walugembe, 2007)
Netiquette - study guides and strategies file
Open University Netiquette summary file
Master the Basics: Netiquette