I have argued this fact as well about it being in the blockchain. I am fairly technical and can determine how to get at it if I want. Likewise, if the government deems certain things are banned and locks them in a vault. They technically still exist it is just difficult to get to them.

So in effect the crushing hammer blow of a down vote can be very similar to shoving something in a vault. Many people will be unable to view it. Perhaps someone will make a reversesteemit.com or something where the trending page and popularity is 100% the opposite. You'd have to wade through a ton of spam but you might see these posts that were splattered. The problem is this shouldn't be being done for opinion.