However, I just reading an article about an Agent's vacant REO listing ended up on Craigslist as a rental as part of a scam. Not only is managing YOUR reputation important, but managing YOUR LISTING'S reputation is important as well.
Not only should you be setting up Alerts for yourself, but you should be setting up Alerts for your property's address and Subdivision names as well.
Not picking on Craigslist, as I know many Agents get great leads through the service. But unfortunately there are a few out there who can ruin it for all. Protect yourself and protect listings by hiring Google and Yahoo(they work for cheap- free actually) to be an Internet watchdog for you.