That's a big question. What makes it so difficult is the fact that not many people realise what's happening and are unknowingly actively or passively assisting in it.
If we're going to be able to stop this, a great many more people are going to have to understand what these people are up to, such that an effective coordinated effort can be mounted and launched against them.
But in my own opinion, until that happens there's not a lot we can do other than try and spread the word as best we can.
Though we have to be tactical since they don't want us spreading the word and they can do bad things to us in order to try and stop us.