Oh I can almost pick out political messages if I want in most movies. The one I used, surveillance, that could definitely be said to be 'political' debate right there.
Thing is, I tend to ignore what the actor/actress/director says whenever possible. Especially if, take it on face value, there isn't some 'right/left' political BS going on. Yeah, he used terrorist to describe the Joker. But, isn't that what the Joker is in the movie? He isn't simply a 'criminal mastermind', but he truly is turning Gotham City into a horrific nightmare. Just what the original meaning of a terrorist (without the political BS behind that word) is.
Heck, Wall-E, from the looks of the trailer (have yet to see the movie), I could get a bigger political message out of that movie than The Dark Knight. I mean, deserted planet because of over consumerism? Harming the environment? Allowing some 'greedy' corporation to make you fat and lazy? This could all be taken as political.
And yet, if/when I see this movie, I'm not going to go in it thinking "Damn. Political message. Fark this!" I'm going to see the movie on its own merit. And so far, Pixar hasn't disappointed me once, and I doubt Wall-E will.
Don't get me wrong, there are times when I go, "Shit. Why the Hell are they shoving politics down my throat?" The Star Wars new 'trilogy' movie, ignoring the JarJarocolypse, had one line at the end of the third one that simply made my cringe. It was apparently George Lucas way of being anti-Bush/anti-War that, was just too damn obvious and actually detracted me from enjoying the 'subpar' movie. These are times I go 'dude, leave your politics at home'.
Otherwise, even if a movie is 'left leaning' or 'right leaning', I try and take it as is. And it's probably why overtly political movies are doing badly. Because it doesn't matter the message, people don't want to be lectured.