To downvote a node because you disagree with the opinion expressed in it. This occurs on a sadly regular basis. Well-written and thought-provoking nodes can often suffer simply because the voter disagrees with the author's point of view.

It should be noted that some nodes on controversial issues deserve to de downvoted. For example, if the write-up says little other than "(Politician) SUCKS @$$!!!! I HATE (Politician)!!" then nobody is going to cry when it is nuked.

On the other hand, a node which contains a perfectly valid defense, such as "I dislike (Politician) for a number of reasons, including X, Y, and Z. " etc, should not be downvoted, no matter how repugnant you may find the opinion expressed.

A call to action:

Fight back against censure-voting! Vote for all well thought out nodes, even if they are completely wrong. Support intelligent discussion.

If you want to see censure-voting in action, visit any node related to politics, religion, or abortion.