Apparently asking for "reliable workers" might be just a bit too discriminating in today's uber-sensitive society. At least that's one recruiter's experience after a government-run employment office refused to run her ad seeking a housekeeper because it might be found offensive by some.
See average salaries for housekeepers.
So what did the ad say to inspire such ire? Something companies have long sought: applicants that "must be very reliable and hard-working."