I'm one of those people that think that what you put up on screen, no matter how you're stating it, is usually an advertisement for it. Even if I'm saying "it's really bad to do this, or it's really good to do this" - regardless, the fact that it's on film, presented in this huge way, is appealing.
It's important that people press from the outside. It's important that people are able to make change from the inside. Both of those things are important. Protest is fundamentally a political act.