Great idea, but the database might not be structured like that. (I know, I should grab the code and check myself). This is similar to the reputation problem of viewing your node. If I have a node that has a rep of 5, is that because only 5 people bothered to give it one positive vote each? Or perhaps it was really controlversial and got 140 negative votes and 145 positive ones. It's not that big a deal to me, but it's one of those "might be nice" category things.