Luong The Vinh private high school in Hanoi last week became the first school in Vietnam to issue a ban against students from using Facebook to defame or insult others.
The move comes after at least three students in the country were suspended for such entries.
The school's website published a four-clause regulation on Tuesday (January 15), listing issues that it will consider taboo in the Facebook pages of school students.
"Absolutely no swear words including those written in short forms"¦ It is mandatory to use clear, Vietnamese language," the first clause says.
The second one bans students from "saying bad things" about anyone and recommends that students click the "like" button on other's statuses only after reading it carefully.
"The owner of the Facebook page is responsible for liking status with bad content," the third one says.
The fourth clause warns students to refrain from "leading friends to misunderstand" their status.
The regulation mentions that "everything is two-sided," adding students should share feelings correctly "based on the knowledge and intelligence of each person.
"Facebook is not a diary, thus nothing private should be written down there," it says.
School principal Van Nhu Cuong told VnExpress that the regulation was a trial effort to attract students' feedback before the school issues more detailed rules.
"After the case of an eighth grader insulting teachers, I think it is necessary to take action immediately to stop such situations," he said, adding that his school has already suspended two students for insulting others on Facebook.
Early this month, the Ly Tu Trong Secondary School in Quang Nam Province's Tam Ky Town handed down a one-year suspension to eighth grader Nguyen Thanh Vy for "insulting her school and teachers" and "distorting history" after she parodied on her Facebook page President Ho Chi Minh's 1946 appeal for national resistance against the French.
Thanks to the guarantee of a local youth union unit, she was allowed to go to class again under a school decision taken on January 14.