I for one do search the site for new art based on score. If something filtered by my blacklist doesn't gain a score of at least 10, I'll never see it. This filters out a lot of what I consider low quality art. As for downvoting, I rarely do it, but when I do I just vote and do not explain myself. Doing so is usually futile because the white knight types just downvote that sort of comment out of view anyway. I don't see any reason to expend the effort. I cast my vote and move on.