I do not believe anything can be overvalued. I disagree with the philosophy behind the line of thinking and everything relating to the need to correct something like that.
To use an analogy to help explain what I mean, it is like disliking a video on YouTube solely on the opinion the video received too many likes. Well, technically, a dislike does not displace a like. And that is my concern with how a downvote can minimize the upvotes on Hive.
Yeah, I guess flagging or downvoting can discourage and minimize spam, plagiarism, repetition, low value content, copyright infringement, boring posts, unwanted posts, illegal content, etc. So, long story short, I'm not totally against a desire at policing. But specifically in regards to trying to counter overvalued posts in particular, I find that to be way too hypothetical and possibly a version of robbery.
I guess it all depends on how the rewards pool works and the details therein meaning I understand the logic of trying to vote down posts which may be overvalued. I can sympathize, empathize, realize the point of view people have, but I also find it to be dangerous to try to stop people from making too much money or to stop posts from making more money than they deserve to.
My philosophy would be if you think a post got too much money, then simply upvote other posts, share these other posts in order to get many people to upvote these other posts. In doing so, then you may keep many more people from voting for the overvalued post and voting for other posts should be able to water down the total value or percentage of how much the overvalued post would get during payout 7 days later.
I don't know what linear curve means for Hive, I don't know what kind of curve it currently have, but I have fingers crossed.