A person who engages in obsessive and unwanted pursuit of another individual can be referred to as a "crazy stalker". However, there are several synonyms that can be used instead of this term that still effectively describe this disturbing behavior. Some alternative terms include "obsessive follower", "unyielding pursuer", "compulsive shadow", "creepy admirer", "overzealous fan", "maniacal devotee" and "delusional pursuer". It is important to use caution when describing someone's behavior, as labeling someone as a "crazy stalker" can be harmful and may stigmatize individuals with mental health issues.