Well...
If you don't want people to vote zero, then don't go to a website where people can vote on your stuff.
If you can't take the heat, then don't post your stuff. It is the nature of the internet. If somebody can vote something 0, or "dislike" it or whatever, then that is what is going to be hit. Your only escape is if you have an "in" group of people to vote you up. either that or be the absolute best of the best, which usually only results from being in an "in" group to begin with.
Pretty much the entire meaning is: The ratings are pointless. Whether it is a 5 or a 0. A like or a dislike, it's meaningless. The only thing that will help is comments and reviews (and only ones that are actually beneficial and not overly positive or overly negative). If a score sways you either way (getting 5s or 0s), then you are wasting your time. It shouldn't be about the score, it should be about getting information to better yourself as an artist. Also keep in mind that not everyone will like your work, and those who don't, are well within their rights. Just like you probably don't like certain types of art yourself. If somebody is rude and crude, then just ignore them. Also don't let flattery go too far either, as it's not beneficial either (most don't want to know this).
I voted 0, but that is because I can. People have voted me 0, and have commented negatively as well. But I don't care, because it doesn't matter. If a comment is full of bull, then you will know. This is how life as an artist on the internet works. People will troll and flame you for no reason.
All in all, I don't really see the point of this. You are basically just signing on a silver platter to get flamed and trolled. May as well keep it up now though, to show that these types of things will no longer bother you and you will move on, focusing on what actually does matter.