Great question and interesting angle. I think the algorithm would reverse into us being controlled, like Susan says, into think and feeling only what is presented to us. A good example of this is also Facebook’s censorship of conservative views in its algorithm. By only presenting liberal ideals, they influence their users into considering one side of an idea. Taken to an extreme, Facebook users would only be exposed to this view and would essentially be told what to think.
However, this used to be how the music industry worked. You either listened to the pop station or the alternative station (maybe the country station if you’re into that), but that was that. You were one of a very narrow selection of categories, and those were determined by the stations available. However, an underground scene developed and held shows and produced records for its own followers. With the internet, pirating and online listening spread new bands and kinds of music quickly, reducing the influence of the radio and media on what choices listeners had. In regards to social media now, this is happening with Facebook in regards to Snapchat. Users are moving to a more direct and intimate mode of social media, moving away from fully filtered content.