As the title says, it seems a better way than to PM or ask in the comments of the picture and its centralized. There needs to be some rules.
1.) For the benefit of the user, there can be a link to the ToS and
2.) Indicate this isn't a place to question why images were flagged.
3.) There has to be a given reason why it should be flagged and it is ultimately up to whoever has the ability to flag it, and up to the janitor, moderator, or admin staff to unflag it for reasons that are their own.
If this is a workable idea, or if it needs fine-tuning, let me know. If you are completely against it, I would like some explanation for it aside from "no, just no"
Updated by RaisingK