“Netiquette” is slang for “Internet etiquette”. It refers to the accepted behaviors and practices regarding interactive online activity such as discussion forums
, chat rooms, and e-mail.
Don’t type in all capital letters
Typing in all capital letters on the Internet is considered rude because it is difficult to read and comes across as very aggressive (LIKE SHOUTING!). If you take away nothing from this ‘how-to’ other than knowing that typing in “caps” is widely despised on the Internet, consider it time well spent.
From Yahoo Answers
...use CAPS sparingly - only for emphasis on one word or phrase or for acronyms.
It is not only considered yelling, it is also harder on the eyes because all of the letters are the same height. Having letters of varying heights makes it easier to read (see the difference between e, t, and g - one is normal, one is "tall" and one "hangs").
and
ALL CAP postings are wider and do not fit well on the main message index page.
I hope you enjoy your time here.
With best regards,
Jim Martin