I've heard CL called "Murderlist" on numerous occasions and for good reason. Like Rocky's friend, a lot of people have met a tragic end through answering or placing ads on Craigslist. I read CL related murder stories in the news quite regularly. My own experience of Craigslist comes from years ago when I first moved to New York and lived in apartment shares for the first couple of years. I met so many weirdos and fruitcakes and downright shifty people through answering CL ads. From the creepy old guy who put his hand on my knee and asked if I had a washboard stomach, to the filthy old guy whose apartment was stacked floor to ceiling with piles of old newspapers and who told me that if I brought an air conditioner into the apartment there would be violence. I also remember at the time there was a guy on Roosevelt Island in Queens who was luring girls over to his apartment on the pretense of a cheap room in a luxury apartment. He would show them into the room, turn off the light lock the door and refuse to let them out until they kissed him.
I realize that a lot of people have good experiences with Craigslist, personally though I just see it as a magnet for freaks and monsters.