Be nice. Be respectful. Be civil. Be open-minded. Be honest. Don't dox. Don't harass. Don't spam. Don't troll. No hate. No threats. No violence.
Prejudice can be expressed generally, but be broad, never targeted at any one individual. Prejudice is not condoned on this platform, but it is accepted so long as it is broad.
It is vital to hear everyone's opinions. If you disagree with an opinion, it is vital to add your opinion rather than erase another's.
In curated opinions, providing proof is vital via references. If your edit in a curated opinion is proven wrong, it will be reverted. However, if it is questioned, it will be left alone with a large caveat being that is is largely questioned or can be stated that it is largely proven wrong.
For example, the Earth is not two dimensional and can be scientifically proven. However, saying that humans were invented by God can be stated as a belief and remain in curated opinions. To disagree does not mean to revert; rather, add why it is disagreed with. In curated opinions, using known false references will result in the reversal of the edit. Examples include sites known for falsifying evidence such as authors of doctored images.