Not long ago, I had my attempts to clarify a question were met with antagonising comments. I nevertheless worked to find an answer (yup, I know, shouldn't have). By the time I got back to type it in, the question had been deleted. Possibly because of the authors' antagonising comments. As a fiddle had been provided, I updated the fiddle with my answer. There didn't appear to be any way to notify the person.
The next day, the same question was reposted. So far as I could tell, an exact copy and paste. To avoid pointless confrontation, I flagged the post but there didn't seem to be any type of follow up (no notification, no way to know if anybody checked it out). I tried to address that with the author and all I got for it was more antagonising comments. Some getting into the abusive zone.
The question is: How do I create a column chart with negative values?
Where can I find the rules on question reposting? What can I expect to happen when I flag a post?