This is an interesting thread.
I would guess most of these techniques only work with more insecure partners.
For example, if I was dating someone and I called to invite them somewhere, but they said they were too busy and then refused to tell me what they were busy with, I would basically persistently harass and bug them until they told me. And if they still wouldn't it would be a deal breaker..
Good relationships are founded on trust. Keeping secrets doesn't contribute to that. And I don't want a life where I am constantly trying to pry information from someone.