My theory is probably wrong, but it is possible that this article is a way for the author to signal his skills/worth/value. Someone with low skills and who's desperate to find a job is highly unlikely to publicly complain about the amount of attention he gets from recruiters, so by actually doing it, he signals that he has high value.

But I do believe the more likely explanation remains that this guy got angry after getting harassed repeatedly by recruiters and decided to do something about it.