hahahaha wow I don't think I've even done that anywhere before :P
The reason is displayed right beside the post in question with the same amount of space given to both, so it's arguably pretty important. But you don't need to write a novel unless you think there's a reason to explain why the post makes you uncomfortable. So like, if it's a thread revival, those two words are all you need in the reason field. If it's an inflammatory remark that is dubious as to whether it follows the rules or not, a longer explanation might be needed so that the staff member who deals with it can figure out why you reported it--sometimes it's not always obvious and if that's the case, it could be closed without a second thought if extenuating circumstances or backgrounds aren't explained. (If it's a duplicate thread, a link to the thread it's a duplicate of is always appreciated.)
