> "look over the person's shoulder while working in bed"

I don't know, maybe you're right. I, personally, am very uncomfortable (almost physically) if I know that someone is seeing my screen and I wouldn't be able to get any work done in such state. Maybe I'm just weird.

> "your work is really interesting and important, please tell me more"

This one is unrelated to physically being inside someone's house.

Actually non-advanced security technology can prevent that by locking the system / user entirely if they're using their work laptop or accessing company data like... emails while not in a secure location, e.g. the office.

Corporate security is a strong reason for leaving your work at work.