Not upvoting is the same as "I disagree". That's how I see it.

I've only downvoted one thing here because I believed that it was done to perpetuate an argument. I came back and removed the downvote later because any sort of attention given to them justified their cause.

Up vote what is something that is worth it, If your post doesn't get upvoted, then it probably wasn't worth posting.

Edit: My english is failing me this morning.