@6) That's just bullshit pessimism for pessimism's sake. Of course protest like this matter, because they draw attention to an issue aggressively more than a blog or blog comment can alone.
Case in point: Sightline has been covering this aggressive problem for a year now.
Took some arrests to get attention to the matter. And candidates running for office getting arrested is drastically more newsworthy than just plain-old activists.
To pretend these things don't blow up is willful ignorance.