One of the big no-nos in cyberspace is that you do not go into a social activity, a chat group or something like that, and start advertising or selling things. This etiquette rule is an attempt to separate one's social life, which should be pure enjoyment and relaxation, from the pressures of work.
Judith MartinThe simple idea that everyone needs a reasonable amount of challenging work in his or her life, and also a personal life, complete with noncompetitive leisure, has never really taken hold.
Judith MartinIt doesn't matter whether the bride or the bridegroom writes the letters of thanks for wedding presents provided that these go out immediately after the arrival of each present and are not in the handwriting of the bride's mother.
Judith Martin