I really hate it when people get all self-righteous about other people not voting.
Going into a ballot box and making a mark on the paper is an implicit acceptance of the idea that it is the only legitimate way that change happens, and that it works. Personally, I don't agree with Brand on very much, but I do share his sentiments here. I can't see any evidence that this is actually an effective way to change things in the UK and I will not be persuaded otherwise by being emotionally blackmailed with the rather pathetic "you have no right to complain then" argument.
Not voting is the only thing that seems to scare people now. It's the only thing that seems to make people worry that there is a problem.
As for Brand, I do think he has a habit of throwing around big words without actually giving much thought to them, and often comes across quite incoherent. He isn't stupid, and he makes some valid points, and I actually admire his ability to refrain from taking himself too seriously, which normally defeats people in interviews. His politics, however, aren't particularly well thought-out.