Netiquette is a set of social conventions that facilitate interaction over networks. The points most strongly emphasized about netiquette often include using simple electronic signatures, and avoiding multiposting, cross-posting, off-topic posting, hijacking a discussion thread, and other techniques used to minimize the effort required to read a post or a thread.
Netiquette guidelines posted by IBM for employees utilizing Second Life in an official capacity, however, focus on basic professionalism, amiable work environment, and protecting IBM’s intellectual property. Similarly, some guidelines call for use of unabbreviated English while users of online chat protocols like IRC and instant messaging protocols like SMS occasionally encourage just the opposite, bolstering use of SMS language. However, many other online communities frown upon this practice.
The Daily Omnivore 