The obsession with sex is a product of biopolitical studies inspired by psychoanalysis which investigates the underlying sexual undertones of social phenomena becoming widespread. The sexual revolution happened half a century ago mate, the difference with today is the internet.
The internet allows people to reveal their deepest darkest desires without fear from the Other. You can go online and act and say things you really want to say with little social repercussion that you wouldn't have been able to those around you in real life. The honest truth about people isn't that their deepest darkest desires, the unconscious mind, is what ultimately determines behavior, but impotence in the face of the Real. Somewhere out there people are doing things, experiencing things (not necessarily "sexual") that you aren't, and you never will. The internet just enables people to express this like never before.
In postmodern society, corporations don't just want you to experience their commodities, they want you to in a very specific way. The means in which corporate consumerism morally rationalizes this mental regimentation is political correctness. Over-identification with the status quo can lead to an excessiveness that in the end threatens the foundation of the status quo. Zizek's example of this are the constructivists in the USSR in the 1920s; they were so obsessed with the ideology of the status quo, of industrialization, Taylorism, and so on, that they were purged for subversion.
Internet rage is a result of impotent frustration. To reiterate, tumblr culture is a product of corporate consumerism, but corporations themselves would disavow them for their excessive overindentification with their ideological filter for processing commodities. My problem with your argument is that "good consumerism" (as opposed to bad consumerism like American Pie) and "good political correctness" ("duty" "order", etc) is the source of the problem.