Every site should carry this in my opinion. There are generally no rules or standards of internet browsing, posting, commenting. The below mentioned points should help making decisions even when there is ambiguity.

Net Etiquette

• Introduction

• Rule 1: Remember the Human

• Rule 2: Adhere to the same standards of behavior online that you follow in real life

• Rule 3: Know where you are in cyberspace

• Rule 4: Respect other people’s time and bandwidth

• Rule 5: Make yourself look good online

• Rule 6: Share expert knowledge

• Rule 7: Help keep flame wars under control

• Rule 8: Respect other people’s privacy

• Rule 9: Don’t abuse your power

• Rule 10: Be forgiving of other people’s mistakes