While prevention can go a long way, it doesn't prevent ALL inappropriate behaviors. It is important to keep in mind the different between "inappropriate" behavior and behavior that warrants a formal response from the College, such as the student conduct process or a police response. There are some suggested strategies to help you with some of the more common behaviors that students (and other office visitors) might exhibit.
For more concerning behaviors (such as threats and significant disruption), you may need to contact Harper Police, Student Conduct, or the Harper Early Alert Team (HEAT). A guide to Identifying Types of Behaviors is available for your reference in managing these situations.