Professionalism

So as some of you know I work in my dorm office during the school year. It is very relaxing and slow paced to say the least. However, we do at times have to deal with important stuff in which we have to act professionally. However, most people do not seem to understand this concept in today society. They feel that in a low key job they do not have to hold themselves to a professional standard when dealing with important issues, for example a male student wanted to know when one of the female students worked next. Most people I have come in contact with will give this information out. However, this is illegal!! You never can give out the information that a person cannot gain somewhere else. My question to you is why do people not act professionally in any job they work at?