"So it is fine to offer a non existing job and waste the time and effort people looking for a job put into applying if it is done in the name of science?"
Companies do this all of the time. It's a way to keep an eye out for people that they might hire even if they don't need to fill a position. Some job listings are aimed at just one person or a very short list as a way to get around non-poaching agreements. If you leave a company to start your own, your employment contract may forbid you from making offers to colleagues to join you, but you can post a job with such specific requirements that the people you want to bring along will be some of the only ones that fit the bill, you might be able to stave off a lawsuit. You will want to talk with an attorney first if you decide to tread that path.
Biting the hand that feeds IT
