No, stalker has a security camera company, and you visited the stalker's house once because of this great party and left when it seemed dead. Stalker now knows you and starts noting every shop you visit through the cloud connected cameras. You had downloaded an app to get into that party and forgot to remove it later. You start getting notifications about the last restaurant you visited.

This metaphor is getting stretched to the point of complete craziness, but all of this is totally possible. But my bigger question is, when does autonomy and agency end when it comes to these "invasions" (quotes only because we all allow it in varying forms, but it's the creepy emotional factor that seems to elicit a response)

I don't associate with this stalker, I've blocked them from my contacts, moved away, told my friends about them, and I still experience moments of anxiety associated with their incessant invasion of my personal space, and the fact that they conspire with other stalkers to build the most complete profile of me possible.

And the police don't seem to care at all, nor do their masters.