There have been enough times where I've witnessed completely factual and legitimate comments here that happened to criticize or even just question Mozilla, Rust, Ruby on Rails, NoSQL, or some other "revered" organization or technology get heavily voted down without justification.
Some of this may just arise naturally. Certain submissions may draw the attention of people directly involved with the given organization or technology. They may take it personally when the discussion touches on perfectly valid, yet perhaps painful, topics. They respond by downvoting these comments that are totally valid and raise some good points. Even if these people are not intentionally acting maliciously, this misvoting can still be quite harmful.
I'm not certain that there's a good way of dealing with this, however.