However, I've had really great luck with it lately. Sold a bed within an hour of posting it, and bought a nice table for $15 and picked it up the next day after I emailed her.
I suppose, much like many things in life, you have to use it carefully.
Walking in the city after dark by yourself (Hey, I know I shouldn't, but I live alone in the city and I don't have a car. This is Minnesota, it get dark at 4pm in the winter. It is literally impossible to not walk alone after dark) is another example. Be smart about it. Act confident. Be polite. Keep to yourself. If there's a group nearby, you can keep close to them so creepers think you're with them.
I must be getting more street-savvy, right?