In the original version of How can I fix the font problem of this pdf file?, I have a pdf file which can be rendered correctly by evince, but the text can't be correctly searched or copied. My intuition is that since the pdf file can be rendered correctly,it is possible to find out the font that evince uses to render the file, and then fix the font problem from there. So I believe the problem can probably be solved based on the symptom alone, without the need for other information .
In the first two comments, I was accused of trying to hack a file with copyright protection, and I said no, and I created the file from another which doesn't have the problem. I was then urged to explain how I created the file. I didn't think information beyond the sympton is necessary to solve the problem, and moreover, it is not easy and could take a while without guarantee to remember exactly what programs and scripts that I applied to create the file, and to narrow down to a specific step. So I left a comment to say so. Then a user who is now a moderator intervened:
Tim, consider someone who wants to help. You're saying: "I have an original file that works correctly. I do some combination of steps, combine it with other files, do some conversions, and now it's corrupted." How much effort do you expect Answerers to undergo, when you could certainly narrow the range considerably?
Although I don't believe how I created my file is necessarily relevant to solve my problem, and although it is not easy and no guarantee to find out how I created the file,I didn't want to have anything directly to do with the particular user, so I took time to test many possible programs that I used to created the file and finally narrowed down the problem to
gs command, so I updated my post with my new findings.
Then that user posted a second comment
I'm no PDF expert, but is it possible to provide the original ("correct") PDF so that Answerers can re-run your commands in order to reproduce the issue?
Since he is not an expert, now look back at his first comment, what makes him think how I created the file is necessary to solve the font problem of my pdf file?
Moreover, AFTER I bent myself to his first comment, and made my final update to my post, what does this question in that user's second comment want me to do really: "is it possible to provide the original ("correct") PDF so that Answerers can re-run your commands in order to reproduce the issue"? What kind of image did that user want to paint me, by pretending not seeing my update?
Moreover, my post has been continuously receiving close votes and downvotes, which came from other users triggered by the comments, and which are out of context, and very likely out of personal attacks or discrimination.
The author of the last two comments, since long before becoming a moderator, has been belittling and picking on question posters and their posts including those he has limited knowledge about, and closing (deleting, and downvoting) posts (and provoking other users to do so). When he receives disagreements, he often accuses question posters for not following the site policies and threatens them to leave the site and find somewhere else. His behaviours have obstructed discussions on many valid posts, and triggered other users with similar mindsets to do so. These contradict the mission of a moderator.
That is based on not only my numerous encounters (I could provide the evidences if not yet deleted, if I know how to search for them efficiently, and if my life allows me to spend a lot of time to do so), but also on my observations, for example, not not long ago, in "That is not possible" is a valid answer. he had to apologize after being called out politely by more than one users, but the damage from the obstruction has already been done.