To further support that @justineh, I think steem did a great job removing flag and adding the downvote button. Flagging etiquette lead to the reward pool being drained by DrugWars battle report and spam, meanwhile we should understand the stake based mechanism which is being reward distribution. If I disagree a photo of a cake is getting 100 USD in reward, I should be able to use my stake to limit (or stop that). That's what consensus based community means.
@acidyo