The thing that scares me about this the most is the attitudes of people I ran into face-to-face registering voters this year. I ran into quite a few people to would make similar statements and the interesting thing was that after a while I could actually predict pretty well how people would respond to being asked if they were registered to vote from a distance. The people who had very cynical responses looked miserable (from a distance, before I talked to them) and likely were miserable (thinking the world is crap and everyone is lying and we're all being spied on and no-one can stop it, etc) and it leads me to believe many of the people who comment on these stories in similar ways are similarly miserable.
The bad-news flood from our overly connected lives I think is starting to have a serious effect on peoples psychology and it is making it harder and harder to have reasonable discourse. In the end at this rate its going to be a small number of news-junkies and academics and a bunch of extremists and the rest of the population will be tuned out as long as there is enough food and distractions available.