Parents need to be instilling this in their children; instead of making them comfortable with little white lies to others~ The vulnerability that honesty requires isn't something that everybody can handle. Lying allows people to be comfortable.
An occassional praise or quip is one thing, but putting your relationship drama all over FB for the world to see is a sure sign that there is a HUGE problem. And, if the ONLY thing you EVER post is drama. well, it& time to reevaluate.