The solution to bad votes is more votes and better votes. The solution is not to silence the only things that are retaining our authors by doling out rewards and thereby preventing author demoralization. As a person, I can view and vote on a dozen pictures in the same time it takes me to read and vote on one article of moderate length. Some form of automation is needed to balance the scales.

Whatever algorithm a bot is using, it's a heuristic for post quality. Like all heuristics, some are better than others. In the end, the algorithms that win will be the ones that make people happy. That means: generating rewards, raising the value of steem power, and attracting readers by raising the visibility of high quality posts. In the end, it's better to have bots voting and maybe getting some wrong than to have high quality posts go totally ignored because they never happen to get in front of human eyes. Especially when longer posts that might take 15 minutes or more to read are competing against pictures that can be viewed in moments.

I elaborate on these points here and here.