I've stopped voting on Newgrouds submissions. To clarify, I've stopped writing reviews. Sure, I've written a couple in a few months, but it's a far cry from the amount of involvement I enjoyed offering Newgrounds a long time ago.
Because most reviews that I write that aren't overwhelmingly positive or at least a step beyond "Meh" are removed. This is a critical issue with me. I take opinions from others very seriously. If someone hates what I do, I want to know why. If someone is being abusive, I want to stand up for myself. If someone wants to write a paragraph on why I'm the worst game developer ever, I can't wait to read it. If I want to rant about how much I hate stick films, there should be an open forum for it provided that there are no personal attacks (e.g. "Kids like you shouldn't make flash games") and abusive language ("n****r, fag, cunt, etc.").
Newground's recent policy on voting doesn't really support this kind of free expression. Either that or Newgrounds moderators are too quick to tear down reviews that they believe are hypercritical. I understand that they're trying to keep things civil and open to a large demographic of user. But this kind of censorship compromises the validity of the NG rating system.
I hardly trust the 0-5 point scale that the site offers. Most people's votes are too polarized, resulting in a storm of 0's and 5's once a swf is submitted to the portal. It kills me that Achievement Unlocked and its sequel have higher scores than WaterLollies and Dad 'n Me, given the vast difference in production quality and polish. I also find it disheartening that the 5 point score is what determines if a submission is considered for a weekly or monthly award.
The true feedback comes from the review. If there's no room for brutal honesty, then all you'll get is false encouragement from those who only like your work, and there is nothing worse than circle jerking with a site full of ass kissers.