I don't particularly find that to be a huge issue, but I suppose if it does turn out to be simple to implement, then why not? Could come in handy.
My only small complaint is the way it takes you back to page 1 of whichever forum you're in once you press the "submit" button. It seems like it would flow better to be taken back to the thread itself. Or, an alternative solution would be to open it as a new window/tab like +Merit does. That way, you can carry on reading where you left off.
I always encounter this problem because if I am looking at past reples on a thread then after reporting a particular post it's hard to get back to the same page of that thread. To overcome this I use
Ctrl + Click on the Report button, it opens up the report page in new tab.
I would like to know, whether reporting same post by different users help the mods in any way ? Like does it get high priority or just shows up as redundant reported post ?
If it's the second case, then it's much better to display if the particular post has already been reported by other member to avoid wasting mods' time.
Another feature would be to know which of the reported posts caused one's accuracy to drop. Because in my case with 430 reported posts and 98% accuracy I would like to know those 2% posts (9 posts) which were reported incorrectly by me so as to save the time of mods in the future.