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I don't think that giving any messages (feedback) in private will be a good idea. There's two reason:


1. <div id="first_one">If you add a feature where user can "message" in private (1:1 no one else even moderator can't access/see) than, some user will use abusive/harmful words. So, 1:1 isn't a good idea.</div>
2. Now, what if moderator can access them. So, <a href="#first_one">no 1</a> won't happen. So, **is the feature OK?** No, totally not! Cause, there's lot of user. If you see a poor quality post than you will feedback in private which only moderator only can access. Then, if I see the same post I will do the same thing. So, the author will get tons of private feedback which are saying the same thing. 

So, messaging (giving feedback) in private won't be good feature. 
>Deleting posts “as slowly as possible”. Bad questions get slowly grinded down into the dust by down votes, comments, close votes, all in public, really rubbing it in. And even when it sits there with 5 close votes and -10 score, it is still published for everyone to see.

It's a good idea. Cause, In SE there's lot of poor quality post which have no answer and, they are closed. However I update the post SE doesn't open it. I don't know why. I had faced the issue. Poor quality post should be deleted cause, user like me review old posts. If user sees posts like this we(user) feel annoyed. So, it would be a good idea to delete posts like them.

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Most of new user (like me) don't know how to ask a good question. And, we don't want to search a lot to search for how to ask a good question. While it's completely like we are just wasting time. So, when user creates an account in Codidact. Then, they should be redirected to a page where they can read about **How to ask a great question?**, **How to use MathJax?**, **What is meta?**(Not every understand how meta works . I was one of them also. @MonicaCellio told me in a post) and some more. And, there should be a logic given the user can't ask any question until he reads "How to ask a great question". If user gets knowledge how to ask a good question than it will very useful for others (answerer).