Not wise to generalise - I'm an HN reader and I do not think "Greenpeace is omnipotent".
I used to be a Greenpeace supporter and would donate to them, even. Then I started to get harassed by their "premium donation agents" and stopped. Over the years, I have realised that they have taken up certain good causes (anti-oil, anti-whaling) but have also been rather misguided (e.g. stop all nuclear rather than argue for realistic-safe nuclear).
I used to be a Greenpeace supporter and would donate to them, even. Then I started to get harassed by their "premium donation agents" and stopped. Over the years, I have realised that they have taken up certain good causes (anti-oil, anti-whaling) but have also been rather misguided (e.g. stop all nuclear rather than argue for realistic-safe nuclear).