That's only true if your business is crudely comparable to the iterated prisoner's dilemma. But any given recruiter can expect to fall off the end of the mental

That's only true if your business is crudely comparable to the iterated prisoner's dilemma. But any given recruiter can expect to fall off the end of the mental space you've allocated to $BAD_RECRUITERS by the time they contact you again, if they ever do contact you again.