The formatting doesn't really help but let me give this a try:

case 1) There is a small introduction. This post is 100% intended to alert people about a news statement. Are you saying if I did not quote the statement, this post would be okay? What if I screenshotted the statement and posted that instead of the copy/paste? Surely you can see there is no ill intent behind this? The only reason the majority of the text is the statement, is because the statement is damn long. I can't help that. But let's get on, I don't care about my own cases too much.
Although I feel like I should point out that your requirement of the correct way to use quotations is a very poor argument, considering the difficulties and unuserfriendliness of the UI. You can't expect every user to know all the correct formatting perfectly.

Case 2)
Potential shilling for scam exchange and coin: Please provide proof for these statements. In the bitcointalk there are just as many people yelling scam, as there are people who say they are testing the beta as we speak. Just because you don't like a project, is no reason to use community-sponsored funds to censor those based on personal bias. I personally, do have some faith in the project. Otherwise I would not be posting about it. In fact, the content of my post was to announce that the project entered Beta, precisely because this discussion on wether or not it is a scam is going on. The news about the beta seems rather relevant don't you think?

Case 3) Glad the flag got removed. Again, if correct formatting is so important perhaps this feature should be more inherent to the Steemit platform. As it is, bare bones, you should expect to see somewhat bare bones articles. This does not warrant severe moderation in my opinion.

Case 4) You say shilling/scam coin but 99% of this rather long article is about this person describing what different wallet options are available. Only at the bottom are a few referrals in the signature. His entire article got flagged just because somebody takes offense at a couple lines of text. A practice that is very common on every social media platform and is often done by many of the top Steemians who, oddly enough, never get a visit from the Steemcleaners.

Case 5) Again, please provide proof that Authorship tokens are scam tokens. Poster is very clear about how the referral works, and is merely offering followers to sign up for free tokens. Wether or not this will turn out to be a scam or not should not be up to Steemcleaners to decide until it is actually publicly known that this is a scam.
Let me remind you that plenty of people call STEEM/Steemit a scam too. Sounds like personal bias to me. Even today did I see a Steemit Witness' post from some days ago, where he posted exactly this same referral code.

Case 6) Apparently no flag, so okay.

Case 7) Guilty until proven innocent? Should there not be first some real suspicion that there is a case of plagiarism? Perhaps contacting the original author first, before passing a sentence and asking questions later?

Case 8) Similar arguments

Case 9) I consider this to be the same as me posting a poem by Yeats... it's not plagiarism. It's posting a poem by Yeats. Nobody will think I am Yeats, obviously.
However, if this is a clear cut case of the user taking content from other sites and pasting it here, then flagging may indeed be justified in which case I withdraw my objections.

Case 10) This seems like a lengthy and thorough article in French. It's so thorough that i had to scroll and really look for where the offense is. It appears to be the fact that person posted links to faucets? That should totally not be an offense. Faucets have been around since the beginning of Bitcoin and many crypto enthusiasts started there. Fortunately, you say, there was only a warning. I have not figured out yet how to determine wether or not (and by how much) a person is downvoted. I just go by the comments that Steemcleaners leaves behind.

Case 11) And just because they didn't adhere to perfect formatting, doesn't mean that they are imposters. Guilty until proven innocent? I hope this user was warned, and not flagged. I would imagine this user gets a chance to defend himself before the sentence is passed.

All in all I can't help but feel like moderation is too severe. The intent is likely good, nobody wants to see real abuse. But there are many posters who are being lobbed in with abusers while they are in a much greyer (more white than black, often) area. It's creating a negative atmosphere and is discouraging victims. If people get flagged, there better be some proper research, communication and reasoning behind it.
I hugely object to the flagging of people who post about, what you call, shilling or scam coins. Yes, if it's a proven scam, but as long as there is no proof we should not be censoring. All cryptocurrency has been called a scam at some point. I personally feel Bitconnect is a scam. But yet, today people are using it, making money and trading it, so who am I to judge? Especially not with an account that collects community funds - I firmly believe the majority of the Steemcleaners supporters will not agree with many of the flaggings above and may object to the fact their upvote-money is being used for this. They probably think it's to fight hardcore spam and abuse, which the majority of the above cases are not.
Thanks for your reply. Are you with the official Steemcleaners team?