I understand that you can see who upvoted and who flagged, but the issue is that it is not mandatory to give a reason why a post or comment was flagged. While I would get my reputation destroyed if I went through and flagged all of a new users post I didn't like, if I had to say why I did each flag, users could see that my flags were not applicable to what was being flagged.
I actually called out the user who flagged my content about flagging (kind of funny) but he she could just not like me, disagree, have hit the button by accident, but I have no way to contact or dispute the flag.
I feel that needs to addressed and you are a user I respect @dwinblood so I would love to have you in the comments on the post.