I think there is a bias of perception between bad flags and good flags. I suggested that there should be an easy way to select a reason or to enter a custom one when clicking the flag. Many people just don't know why they got flag, disagreement on reward can apply to pretty much everything and at it pertain to Steem what steemit inc say are good reason to flag is not really relevant.
The good flags are very rarely talked about because people don't appreciate that some whale downvoting a bigger whale that upvote it's own content increase the reward of everyone else that deserve it more.
Two example from today, who cares really?, the whale who spend SP, who lost a curation opportunity and risk retaliation to flag this isn't getting any praise whatsoever for their good flag. :