With new users joining every day, many people either don't know Facebook etiquette or they don't care. The Golden Rule, and treating people as you would treat them offline is a good start, but just in case, here are some guidelines for how not to act on Facebook, and other social networking sites. For example, why would you post (and tag) unflattering or embarrassing pictures of your friends?

"I feel obligated to point out some of the obvious Facebook etiquette rules that people continue to break, in the hopes that one day, they think twice before posting."

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From the Upcoming ueue, submitted by mrmunchies.