What are some common net etiquettes ?

The list of net etiquettes are as follows:

1. Refrain from personal abuse.
2. Never spam.
3. Write clearly and concisely.
4. Always post correct content in respectful language.
5. In a discussion forum, stick to the topic.
6. Never expect other people to do our homework.
7. Do not post copyrighted material for which we do not own the rights.