Technically you're right, but -
I was trying to having a view of the player being harassed. If I'd be the one I would want them to not being able to interact with me in any shape or form. That includes tracking my current location, taking screenshots of my character, not to mention seeing what I'm currently doing.
That isn't all about not being able to affect our characters - it's about having the opportunity to shut down harassment completely, if that makes sense.