I know they were raided, i know the SII visited a lot of people at 2am asking for data. Some journalists from Canal 13 did a note about that but never got broadcasted.
They learned that they aren't going to be on TV because they are less rich and less powerful than people who wanted the plant. That knowledge made them to ask for help to some actors and then, using internet, the campaign was made public.
The sites chaopescao.cl and salvemospuntadechoros.org were asked by phone to be removed and hosting company agree with that...
I created myself an account on hn just to tell you that this maybe is not a common politics, but it still happening, specially away from santiago. You don't have to belive me and say this is what happens in chile, but it will be more than cool to keep your mind open to notice when this happens, and confront it and make it public.