> The reddit guys came by our Cloudkick office late last year and flat denied there are any bots they know of that downvote when I asked them

I guess they forgot to explain that while it's not bots that do it, there's a feature in reddit code itself makes it look to many people that such bots exist: http://www.reddit.com/r/WTF/comments/eaqnf/pardon_me_but_500...

I've linked that so many times in threads about tragic events or sensitive questions where people even a single downvote personally (ie. it can happen with very small scores but high activity)