In regards to the politics...
I think Nolan loves to ask questions without giving clear answers. Not just in the Batman films, but in all of his movies.
TDKR shows the problems with both extremes. You have people living in "decadence" while others starve in the beginning. But when everyone is given "equality," when people can do whatever they want, it is a disaster. People destroy themselves (which actually proves the Joker's theory in TDK right) because they start caring only about living for themselves. This response is part of what makes them so guilty in the eyes of The League of Shadows
With TDK, I'm not sure he is saying the cell phone thing is wrong. It was necessary for Batman to defeat the Joker. I think it more likely that he is saying desperate times call for desperate measures. But those measures should only be temporary and at greatest need.