As I explained in my answer herehere, blindly upvoting/downvoting is bad. In fact, here is a simple visual guide to help you know if you are voting correctly:
Pretty easy checklist, right? If you are voting based on anything other than the content of the question, you're doing it wrong.
But wait! There's more!
The areas in green also indicate areas which you can improve upon! If at all possible, instead of downvoting, please consider editing the question to make it better. Yes, sometimes the question is unsalvageable, but many times all it needs is a gentle massage.
If you can't tell how to improve the question, consider leaving a comment, but as you said this is in no way required.