], Usenet, [(protocol)|Gopher], Wais, and [
] dominated internet traffic, which was primarily used by educational and research bodies. At that time, it was considered somewhat indecent to make commercial public postings and the limitations of insecure, text-only communications demanded the community have a common set of rules. The term "netiquette" has been in use since as early as 1988, as evidenced by early posts of the satirical Dear Emily Postnews column.
Common rules for e-mail and USENET such as avoiding flamewars and spam are constant across most mediums and communities. Another rule is to avoid typing in ALL CAPS, which is considered shouting or yelling. Other commonly shared points, such as remembering that one's posts are (or can easily be made) public, are generally intuitively understood by publishers of web pages and posters to USENET, although this rule is somewhat flexible depending on the environment. On more private protocols, however, such as email and SMS, some users take the privacy of their posts for granted. One-on-one communications, such as private messages on chat forums and direct SMSes, may be considered more private than other such protocols, but infamous breaches surround even these relatively private media. For example, Paris Hilton's Sidekick PDA was hacked in 2005, resulting in the publication of her private photos, SMS history, address book, et al.
More substantially, an uncivil group email sent by Cerner CEO Neal Patterson to managers of a facility in Kansas City concerning "Cerner's declining work ethic" read, in part, "The parking lot is sparsely used at 8 A.M.; likewise at 5 P.M. As managers - you either do not know what your EMPLOYEES are doing; or YOU do not CARE ... In either case, you have a problem and you will fix it or I will replace you. After the email was forwarded to hundreds of other employees, it quickly leaked to the public. On the day that the email was posted to Yahoo!, Cerner's stock price fell by over 22% from a high of $1.5 billion USD.
Beyond matters of basic courtesy and privacy, email syntax (defined by RFC 2822) allows for different types of recipients. The primary recipient, defined by the To: line, can reasonably be expected to respond, but recipients of carbon copies cannot be, although they still might. Likewise, misuse of the CC/BCC functions in lieu of traditional mailing lists can result in serious technical issues. In late 2007, employees of the United States Department of Homeland Security used large CC lists in place of a mailing list to broadcast messages to several hundred users. Misuse of the "reply to all" caused the number of responses to that message to quickly expand to some 2 million messages, bringing down their mail server. In cases like this, rules of netiquette have to do with efficient sharing of resources and ensuring that the associated technology continues to function rather than more basic etiquette.