It is very unreasonable for users who hundreds of friends to expect interests to he similiar. This could be excused for a smaller site but facebook has detaile

It is very unreasonable for users who hundreds of friends to expect interests to he similiar. This could be excused for a smaller site but facebook has detailed metrics on what I liked where I visited outside of facebook and what purchases I made. Using that targeting is much more effective compared to friend's interest.