Personally I value truth, humour and interesting information. You will note that etiquette isn't part of my up/down voting practice. Other people have different rules.
Kudos is a reflection of the community which means that the community is (if we follow your theory) slightly rude. I don't have a problem with this. I do however have a problem with NOT downvoting thoughtful comments I disagree with. I think it's rude to tell people that they should think like you. I would downvote you for this but etiquette isn't part of my kudos practice and I think this discussion is interesting.