Reports are private, and the person reporting might not share the view of the site owner. It's not worth discussing with them. The report purpose is to have visitor to bring something to team's attention, who can then consider taking action. Involving the reportee in the matter leads to more than needed.
The moment it is reported it's in the hands of the moderator-team. No member must be notified and know of what happens after that. If the reported post will be deleted they'll know soon enough, if the member who posted the reported post receives a sanction then that is private matter.
I also agree that members shouldn't know. If you discard their report as irrelevant or not justified, and they find out, they often turn into whiners are feel the mod/admin team is not responsive. It just sours things.