It would be very helpful if, when I am looking at a question, I could see items that I have flagged in the past -- the question, answers, and comments. I know I can see a list of my flags from my profile page, but I am referring to the ability to see them inline, while looking at the question page itself.
Often, I stumble across the same posts or comments more than once. I don't want to flag a problem post or comment repeatedly, because that wastes my flags and the moderators' time. So, if I have a flag pending, I should be able to see that.
- Perhaps change the pop-up flag reasons dialog to say, "You have already flagged this post/comment."
- Highlight the word "flag" (for posts) or show a red flag icon without hovering (for comments) in the inline view.
- Both (1) and (2) -- my preference and suggested fix.
Note: the same thing should happen for currently pending flags and for rejected or disputed flags.
Edit: A particularly good use case for this is when cleaning up obsolete, chatty, or rude comments with a lot of back-and-forth. It's easy to lose track of which ones have been flagged when there are several to clean up. I flagged 8 such comments on one question recently, and wouldn't be surprised if I double-flagged at least one of them.