You are describing a representative democracy, the parent pointed out the lack of direct democracy in the process. And I would tend to agree that there needs to be more direct democracy involved at some point in the policy making process to accommodate just such a scenario where it's clear the vast majority are not happy with the result.
Representative democracy has it's place, but the reality is that you cannot pick and choose - most people want privacy, but most people are also aware of the wider issues and concerned if the fringe parties are competent enough in making decisions in other areas. Perhaps a good compromise is to be able to shoot down their propositions, so that even though they may not further the ideals the majority want in all areas, they will at least be prevented from eroding them. But as the parent pointed out, there is no mechanism in place to do this currently, so people are limited to protests and petitions.