The reference to throwing stones at the bad man, you being a whore and a slave and the lemons used by rioters to counteract tear-gas, this song, decorated as a lovely flowery, alternative pop-tune is a subtle awakening to the power of mass revolt.
Whether the recent UK riots were the work of a bunch of idiots, a secret service lead plot to encourage higher police powers or whatever mixture you may like, we did see the power of the masses at work. Big Brother may seem powerful but there are only a few of them, and they don't like the idea of the masses waking at once to face them.
I do not see violence as a solution to anything but refer you to an ant. An ant can't push down a large tree, but he can with a team remove its foundations and witness it tumble. As you can't force out a government by replacing it, force then is useless, we can though on mass, remove the foundations on which it stands. We could for example, on mass, over the Internet, organize yearly days where we choose not to work, we choose not to pay tax. We could on mass stand against unfair laws, standing peacefully against bullshit statute "laws" and make a difference.