It's not worded well at all in the original ad and leaves a lot of room for interpretation. It also makes it sound harsher than it really is. Most people would honestly have no trouble abiding by this. If you work 9 to 5, you probably live this way naturally. But being like "DOORS ARE LOCKED DURING THESE HOURS," the ad comes off as hostile and suspicious of applicants. Why would anyone apply to a job with someone who talks like that to people they haven't even met?