I would like you to introduce to a math.stackexchange story I got involved in. A user first asked a question on math.stackexchange. However, that question lacked of effort so it got downvoted. The user edited his/her post and added the done effort to the question, however the question was still downvoted and the user received no reaction.
Later on, the user opened a new post, but immediatly got downvoted very hard for it. People asked him/her whether it was a duplicate of the previous one and the innocent user said yes, not knowing that our habbit here is to first delete your old question, before answering it over again.
However, this question was much better than the original question and shouldn't have been downvoted to -5. I added $\LaTeX$ but still the question is on -5. I surely believe the user is puzzled now and is not too happy of the bad support it got. I am not saying that this happens in most cases, but in some cases we can, as a community, still do a better job at being less harsh to new users who do things wrong they are not aware of.
So what I just want to say is that we still have a way to go, and I want to make us aware from the fact that sometimes, we can still do a little better job at guiding new users. However, we already made big progress by the new website tour, thanks to user Woodface. With this post I want to think of things we can do to prevent the thing that here just happened, from happening over again. All ideas are welcome.