Job search annoyances.

I was searching for an admin job the other day and happened upon this ad for a small business in East Providence, RI. They were looking for an Administrative Assistant to support the 3 Sales Managers on staff.

Apply in person the ad said, so I made the trip out to E. Prov. and much to my annoyance the manager told me the position had been filled almost two weeks ago. He told me receptionist had forgotten to take down the ad despite multiple reminders to do so. He also said that she would not be back in tomorrow. In a half joking manner, I said can I have her job? he said no, but thanks for coming in.

Why can't employers and job search sites Craigslist in particular get it together in terms of having up-to-date job postings, and legitimate employers advertising on their site?

Is it really that hard to institute some sort of screening device such as: nominal fee to post (ie:$25) or form that requires the business to list contact information other than a gmail address?