General Rule: When replying to others – especially those with whom you disagree – imagine you’re having a face-to-face conversation, and ponder how differently you would interact with those people while in the same room, looking each other in the eye, as opposed to hundreds/thousands of miles away. Remember “The Golden Rule”!
A handy guide to netiquette: http://www.livinginternet.com/i/ia_nq.htm
Respectful behavior: Please avoid personal attacks, insults, slurs, and profanity in your interactions. Refrain from racist and/or sexist comments and attacks. Treat one another with civility and respect. This will also include sarcasm and passive aggressive comments.
Watch it on Youtube: Using Your Facebook Group Are Easy And Straightforward