Whilst there may be some truth in this - the mainstream media does their best to shut down alternative voices from left and right, it's not unique to Brand - the flipside is that if you wanted to create a figure to ridicule the Occupy-types, Brand would be it. An inarticulate multi-millionaire with no experience of life outside the meejah pretending to be Jesus Christ and Che Guevara rolled into one.
The RBS stunt seems to have backfired. I doubt I'm the only one who is tired of the likes of Brand (and Michael Moore, Mark Thomas etc) showing up at workplaces and making arses of themselves when, unsurprisingly, the CEO refuses to come out and talk to them. Such stunts inevitably end up with the celebrity SJW, far from speaking truth to power, bullying secretaries and security guards and generally coming across very poorly.