it's a most funniest way to be a ethical and take care of others feelings no doubt down vote give negative impression to others and disheart the account user by down voting we dis-heart them and they start to dislike to posting something it's human nature.
but, i agree one should be no too much desperate to gain reward for this they start sharing plagiarized content and one other thing we have lack of family terms with each other.we should treat other as a family we should develop a family culture in this platform