The level of narcissism that social media has engendered in the current generation is downright scary.
These people are out right rejecting any opposing information or views and deliberately blocking themselves from encountering such. They're basically plugging thier ears and screaming la-la-la-la anytime someone tries to point out an different viewpoint.
An echo chamber will eventually completely distort your worldview to the point you get posters like Mr Wu and his wacky Tumblr crew.
No wonder the inventor of Tumblr regrets his creation, it makes sick people even more twisted and sick.