well I wouldn't expect it to in that circumstance. I just want the most out of what it could do. Stalkers going to that extreme will always get the way around to some degree. I just don't want it easy for them to notice and honestly I would prefer in the long run they not exactly advertise that stuff but just have it be the way it is and someone would have to look into it to know blocking works both ways. It will certainly cut down on the casual jerk. Jerk being a realtive term to the individual. To me a system like that would approach more what organically happens in life. You hang with those you like and avoid those you don't.