Lyric discussion by megalosaurus 

Cover art for Marcie lyrics by Joni Mitchell

I have a distant memory of a late 1960s news documentary about a runaway teenage girl named Marcy who got involved with drugs and hippies and all those evil 1960s things. This included a phone call to her parents. It seemed like that show was all anyone talked about for the next couple weeks, and then she disappeared from the national consciousness as quickly as she appeared. I've tried to google her from time to time over the years but got nowhere. Today I found http://www.mlive.com/news/flint/index.ssf/2011/01/finding_marcy_flint_visit_lead.html , which confirms that she wasn't a figment of my imagination. I recall when this song came out, it was considered fairly obvious that it was about this Marcy.