I think this is a cause of individualism in society today and the lack of proper debate as it was intended. The effects of this are as you say. People are forming their own realities and picking bits and pieces of the truth from wherever they frequent for their news and discarding anything that they don't agree with. That in turn is spewed out in many different forms which will eventually spread its way into society. The effect is only amplified by everyone being always connected and able to share their thoughts. I think this is one of the more pressing issues we deal with as a society today.