"If you don't have to be a dick, than don't be one"
Best quote I've heard all day and everyone should take it to heart. If you don't need to be rude (there are only certain reasons why you would in the first place) than just don't be. It reminds me of how I feel about "the hurtful truth should only be uttered when the question is asked by the to be hurt" otherwise, unless someone asks you if they look bad or what you think, keep your mouth shut. No one wants you to ruin their day.