I invite you to report b-jazz. I can nearly guarantee you will be blocked instead. Your definition of harassing is not going to be received by admins. Users are entitled to comment on any edits, especially if the edits have issues that need to be addressed. It is certainly not picking on a user to point out objective issues with their edits.

It is never acceptable to test in prod. Find a way to test using actual data if the dev server isn't an option.

It seems you are willfully misunderstanding what that sentence means. It means that ability to edit is not restricted by default. It does not mean OSM is your playground.