Few sparse consideration: "push to extreme effect" or when you see something that marginally interest you but keep seeing it because of "customized" results sub

Few sparse consideration: "push to extreme effect" or when you see something that marginally interest you but keep seeing it because of "customized" results substantially invite you to dig deeper and in case of some kind of results push people to the extreme like when you search a thing from a left or right party and in few time you get more and more "lefties" or "rightish" contents. That's may not influence too much normal, acculturated, adults but may influence young and unacculturated people, thinks for example at modern urban legend like "white sugar is poison", like "chemicals trails" and they "tam-tam effect". Another point "censor effect": we know well that a search based information access is less detailed than a taxonomy based one, we experience that often when we organize our mails, documents, files, alternating taxonomy and search based UI. When our entire world will relay on search based UI instead of taxonomy who control search may control knowledge. So it will became easily "hide" something, "push" something else etc. Normally this is not a problem, it start to became a problem when very few search system became so ubiquitous and dominant. "convergence": tied to the first, think only about feeds vs aggregators. With feeds you search for specific stuff and stay up to date while you tend to ignore thing not interest for you. With aggregators this "soft polarization" effect get somewhat lost substituted by another (potentially driven) "hard polarization" effect. As a result general information became less diverse (any publisher try to be at top in any aggregator result instead of follow their style) and people became more "extreme" in their information interest. That's have far more implication than mere privacy. And if you add to the sauce the actual communication systems status like Whatsapp, GMail etc...