Why do some Narcissists stalk and harass while others want nothing to do with you?

Narcissists are just not a group with the same rules, but are individuals. One narcissist may stalk because he's ticked off his victim got away and this has burst his/her bubble, while another Narcissist will be on the lazy side or know he/she can land another victim quickly. They either want to get even or they have tired of their victim.