It's not Craigslist's fault, it's the people who will steal any way they can. Craigslist isn't like ebay -- you are under no obligations to anyone, even if you change your mind at the last minute and decide not to sell. You can repost it and ignore any future mail/email from that person. You can also meet someone at a neutral place if you don't want someone coming to your home. Oh, and put a picture in your Craigslist ad -- makes all the difference in the world!
– A satisfied Craigslist shopper, lol