It happens a lot, probably more than you realize, lots of craigslist scum out there...actually probably not scum, more like flakes...
Well ok.
I have had lots of trouble with people wasting my time on there. Me being the seller, or sometimes giver of things. I’d post something as a free item, and then have people calling and asking a million questions. It’s free! Come get it! If you don’t like it, give it away, just like I’m doing! The item is free, but my time costs money. I don’t advertise there at all anymore actually. It seems a very mistrusting and combative environment.