Some people are beyond stupid. When dealing with craigslist, ALWAYS deal at a police station fucking DUH!
If you're going to sell bitcoins, at least do so in a crowed area with surveillance, like a coffee shop or something, damn.
There are actually spots around the USA with the sign "Safe Craigslist Trade Area" with 24/7 Audio/Video Surveillance. It all comes down to the person's knowledge, I guess. That's the right word.
Have yet to spot one of these signs, but surveillance cameras are a great start.