I think you might have misplaced blame on some of those points. I was not aware that the US government sponsored reality TV, celebrity news, facebook simply by the virtue of not making people pay for them. The government not taxing something does not equate to the government condoning it.
Part of that blame has to come down on capitalism. There exists a market for these things and if the market demands it, is it the government's job in matters of entertainment and nutrition to step in and decide what we can indulge in?
There's also a growing market for people who engaged in making thing entertainment and electronics hacking entertainment.
There's markets for low-brows, which everyone use. Then there are "high-brows" market in which people can engage in their perspective curiosity/sophistication.
For every mindless entertainment, there are niche hobbies which people engage in and put enormous amount of energy into.
For example, my hobby is to speculate on currencies. The side effect is that I learn about money emerge naturally in a free market economy, security schemes, and P2P networks. (Yes, I actually do that.)
Part of that blame has to come down on capitalism. There exists a market for these things and if the market demands it, is it the government's job in matters of entertainment and nutrition to step in and decide what we can indulge in?