The Central Intelligence Agency (CIA) of the United States is famous for using a variety of hiring strategies to find agents who would be well-suited for spying. There were many strange and unique strategies among these. The following is a good example of a very strange, but simple and effective strategy.
First, put out a job advertisement on the newspaper. The ad tells people who are interested should come to a certain office at 7am on a certain day. The ad says nothing about what documents you need to bring, whether it is an interview or a test, or even what the job is. About a hundred applicants arrive on the day at 7am, but the office is empty with no employers or instructions. For two hours, no one comes and many impatient applicants complain that they fell for a prank and leave. An hour later, more people express frustration and leave, saying how rude the company is. By 1pm, about half the group has left, slamming the door behind them. By 5pm, only about a quarter remain. Finally, it becomes midnight. There are only one or two people left by this stage. These people are automatically hired.