NETIQUETTE:
Before we start with the core rules of NETIQUETTE we should know what is Netiquette? Short cut of the word is NETWORK ETIQUETTE which is on cyberspace.
And "etiquette" means "the forms required by good breeding or approved by authority to be required in social or official life." In other words, Netiquette is a set of rules for behaving properly online

The following are the 10 core rules of NETIQUETTE:

1)     Remember the human
2)     Remain to the same standards of behavior online that you follow in real life
3)     Know where you are in the cyberspace
4)     Respect other people’s time and bandwidth
5)     Make yourself look online
6)     Share expert knowledge
7)     Help keep flame wars under control
8)     Respect other people’s privacy
9)     Do not abuse your power
10)    Be forgiving of other people’s mistake

Remember the human:
When you communicate electronically, all you see is a computer screen. You don't have the opportunity to use facial expressions, gestures, and tone of voice to communicate your meaning; words -- only written words -- are all you've got. And that goes for your correspondent as well. When you're holding a conversation online, it's easy to misunderstand your correspondent's meaning. And it's frighteningly easy to forget that your correspondent is a person with feelings more or less like your own. Before you write some you would probably ask yourself “Would you say its to the person’s face?” If the answer is no then rewrite and reread. Repeat that sentence until you feel comfortable saying those words to live person as you send through cyberspace Make sure you know that when you communicate through cyberspace -- via email or on discussion groups or in chat rooms - your words are written. Therefore, you cannot control over those words and there is a good chance that those words can come back to hunt you.

Remain to the same standards of behavior online that you follow in real life:
In real life, most people are fairly law-abiding, either by disposition or because we're afraid of getting caught. In cyberspace, the chances of getting caught sometimes seem slim. And, perhaps because people sometimes forget that there's a human being on the other side of the computer, some people think that a lower standard of ethics or personal behavior is acceptable in cyberspace. The confusion may be understandable, but these people are mistaken.

Know where you are in the cyberspace:
While you are entering the any chat rooms, take a while to look around (read the topic, read what people inside the room act) then go ahead and participate.

Respect other people’s bandwidth:
When you write some words through the cyberspace to the chat room, you're taking up other people's time (or hoping to). It's your responsibility to ensure that the time they spend reading your posting isn't wasted.
The word "bandwidth" is sometimes used synonymously with time, but it's really a different thing. Bandwidth is the information-carrying capacity of the wires and channels that connect everyone in cyberspace. There's a limit to the amount of data that any piece of wiring can carry at any given moment -- even a state-of-the-art fiber-optic cable. The word "bandwidth" is also sometimes used to refer to the storage capacity of a host system.When you are entering the chat room don’t expect that you must have a welcome words. Don’t assume that what you typed are agreed from all the readers. So don’t expect instance responses to all your questions.Some people just copy and paste wasting sentences to other people without their permission, that’s rude in general. Thus, before you pasting any message to other people, ask yourself whether they really need to know? If the answer is no, don't waste their time. If the answer is maybe, think twice before you hit the Enter key.

Make yourself look good online:
In the cyberspace you won’t be judge by the color of your skin, eyes, or hair, your weight, your age, or your clothing. You will, however, judge by your quality of your written.Be pleasant and polite. Don't use offensive language, and don't be challenging for the sake of argument. Again in most chat rooms do not allow you to use bad words so make sure you know where you are. (Rule number 3).

Share expert knowledge:
After all the negatives and some positive advices, don’t afraid to share what you know. It's especially polite to share the results of your questions with others. When you anticipate that you'll get a lot of answers to a question, or when you ask a question to people. Sharing your knowledge is fun. It's a long-time net tradition. And it makes the world a better place.

Help keep flame under control:
"Flaming" is what people do when they express a strongly held opinion without holding back any emotion. It's the kind of message that makes people respond, "Oh come on, tell us how you really feel." Does Netiquette forbid flaming? Not at all. Flaming is a long-standing network tradition (and Netiquette never messes with tradition). Flames can be lots of fun, both to write and to read. And the recipients of flames sometimes deserve the heat.But Netiquette does forbid the keeping of flame wars -- series of angry words or sentences, most of them from two or three people directed toward each other that can take over the tone and destroy the friendship of a discussion group in the chat room. It's unfair to the other members of the group. And while flame wars can initially be amusing, they get boring very quickly to people who aren't involved in them.

Respect other people’s privacy:
If you have talk to someone in the chat room then that person and you agree to have a private chat then you should keep all his/her words for yourself only. Do not copy and paste to other people without his/her permission. Yes it is true someone its alright for you to do so, but are you really sure that all people that you talk to always agree with you to let you copy and paste his/her sentences to the public or other person without their permission.

Don’t abuse your power:
Knowing more than others, or having more power than they do, does not give you the right to take advantage of them. In some cases the person who abuse will get punishment(s) from their admin. If your admin abuse his/her power then go to the owner(s). Something come up in your mind right? HOW ABOUT OWNER(S) abuse? WHO AM I SUPPOSE TO GO TO? Well, let put it this way. Think again, the owner or the high rank than admin they know what are they doing otherwise.

Be forgiving of other people’s mistake:
Everyone was a network newbie once. So when someone makes a mistake -- whether it's a spelling error or a spelling flame, a stupid question or an unnecessarily long answer -- be kind about it. If it's a minor error, you may not need to say anything. Even if you feel strongly about it, think twice before reacting. Having good manners yourself doesn't give you license to correct everyone else.If you do decide to inform someone of a mistake, point it out politely, and preferably by private chat rather than in public. Give people the benefit of the doubt; assume they just don't know any better. And never be proud or self-satisfied about it. Just as it's a law of nature that spelling flames always contain spelling errors, notes pointing out Netiquette violations are often examples of poor Netiquette.