1. Thou shall not stalk with an ex
Because it has been said, it will delay the healing process. (We usually do this).

2. Thou shall not unfriend in a fit of anger
Usually, when we are the in the height of our emotions, one way of lessening those is to unfriend a friend on Facebook. Unfriending is equivalent of rubbing out a person's entire existence from our lives so to be sure we are able to lose the person we unfriend.

3. Thou shall not create a Cyber Bullying Group
Republic Act 10175 "The Cyber Crime Prevention Act of 2012" (Philippine System). This law was created to diminish the crime concerning online interactions. One common problem in social networking sites today is cyber bully specifically posting embarrassing pictures, video or creating fake websites or accounts.

4. Thou shall not wall post what belongs to the inbox
Privacy! Remember that Facebook is a public forum where everyone could see the other post, from their friend to another friend(networking).

5. Thou shall not pass on chain messages to the entire friend list
Others may not want it and it may lead to embarrassment.