Lately I've noticed far too many constructive comments that have been downvoted (usually without any explanation). Please stop this. It's okay to have comments that are not in support with the original post or your own thoughts. We don't have to shoot them down.
Downvoting is meant as a management tool to filter out comments that negatively impact the community, or ones that provide no substance or insight. Please do not downvote legitimate comments.
Thank you.
NEVER downvote:
1) Just because you disagree with a post.
2) Because you dislike the poster.
3) Because others have downvoted a comment into oblivion and you want to jump on the bandwagon. i.e. No need to kick a comment when it's already down.
4) When you have not explicitly reasoned out why you are downvoting beforehand.
DO downvote:
1) Because the comment is derogatory or offensive.
2) Because the comment is factually incorrect.
3) Because the comment is off topic and/or does not add to the conversation.
4) Because the comment lacked any meaningful content. Ex: "Yes!", "Nice post!", "LOL!", etc.
Ultimately the golden rule applies here. Do not downvote any comment for a reason that you yourself would be upset over if someone used that same reason to downvote a comment of yours. In short, just put some thought into it.