Earlier quoted context omitted.
Craigslist runs something like 50MM ads every month without a leak of personal information and a user-driven moderation system, all the while fending off myriad abusers for whom free (or nearly free) advertising isn't enough and think Craigslist should be their personal global spam shitbucket. When the only thing people have to criticize you for is your appearance, I think that says a lot.
Craigslist is so full of spam and reposts it's practically useless for major categories. Take for example Dallas apartments/rentals... hardly a single legitimate posting in there. There is A LOT more to complain about than appearance.
I recently tried looking for a used car in the Chicago area. It turns out almost all the postings in the "by owner only" area are actually dealers in disguise. I found this out the hard way after driving an hour to see a car at what turned out to be some kind of sketchball dealership.
Another time, someone posted an ad for a musical instrument. I go to the guys house and he turns out to be some type of dealer/wholesaler. He didn't even have the actual instrument from the ad and was pulling some bait-and-switch crap.
All of this has pretty much soured me on Chicago Craigslist, but I will say that the experience is probably still a bit better in smaller metropolitan areas.