Here in Spain, inside the "Ocupa La Plaza" movement, we created some sort of differents committees for situations like this.

We had our "legal committee" to work on this kind of situations. Inside it, we had voluntary lawyers and other civil liberties activists trying to manage things like: writing requested legal petitions to the government to be able to demonstrate, helping the "media committee" to write public statements with a robust legal base, sueing the involved people in wrongdoings and supporting our legal rights in general.

I think this is an intelligent approach to the problem, so the big group of protesters can focus on the main problem while the "legal comittee" can work with something they know in the way they know it will have some effect. It's sad, but the reality is that complaining without following the right way tends to be useless, so It's better to let the experts to do this work

In any case, you need to organize yourself creating this kind of informal committees or work groups. You need things like "media intermediaries", "public relations & advertising" people to create more and better ads and propaganda, "translation" to spread your message in other languages, "volunteering" to coordinate new voluntaries who want to help doing something, "internet broadcasting" to coordinate hashtags/forums/websites, "internal coordination" to coordinate between the groups, "external coordination" to create and/or communicate to other groups in other states and countries, and so on... always try to search the help of other professionals devoted to your cause. That will help you.