I think it would be a handy feature to show the user the offending post he is about to report under the 'Report a bad post' text area. The purpose here would be to let the user know which post exactly he is trying to report [for posts close to each other, many make a mistake of reporting something which they don't want to] and also provide easy means to quote a piece of text in the post as the 'Flag bad post' reason.
What do the other members think about this?