As our community grows, it is imperative that we preserve the things that got us here; namely, keeping Drupal a fun, welcoming, challenging, and fair place to play. The Drupal Code of Conduct (DCOC) states our shared ideals with respect to conduct. Think of this as coding standards for people. It is an expression of our ideals, not a rulebook. It is a way to communicate our existing values to the entire community.
Be considerate.
Be respectful.
Be collaborative.
When we disagree, we consult others.
When we are unsure, we ask for help.
Step down considerately.
Source: Drupal Code of Conduct