Last night, I watched uncomfortably as Russell Brand ranted at Jeremy Paxman on BBC’s Newsnight. Coming across more as a disaffected first-year-undergraduate-soc-and-pol-student than any sort of credible political commentator, Brand demonstrated not only an unsettling propensity towards demagoguery, but to be the most frustrating kind of citizen. That is, one that doesn’t vote. In fact,…