How would you characterize a person who...?

Question

....hacks into some usual person's computer and watches what he watches, and tries to create different kind of problems... then knoing stuff about that person's family, like names, faces, work, even what the inside of their house looks like?

How.... exactly?

Answer 1

its Voyeurism its weird and its perverted  

Answer 2

Stalker, perhaps?

Answer 3

Criminal