For the purpose of this chapter:
(1) "Course of conduct" means a pattern of conduct composed of a series of acts over a period of time, evidencing a continuity of purpose. Constitutionally protected activity is not included within the meaning of "course of conduct."
(2) "Harasses" means a knowing and willful course of conduct directed at a specific person with the intent to seriously alarm, annoy, or bother the person, and which serves no legitimate purpose. The course of conduct must be such as would cause a reasonable person to suffer substantial emotional distress, or be in fear of bodily injury.