When flagging an answer, question or comment you later see in the flagging history page whether or not a moderator thought your flag was helpful, disputed or declined.
In past versions it was possible to see by hovering who was the moderator declining the flag. Nowadays you can no longer see who was that. I'd assume that this has some purpose.
Of course the moderator's decision is final, however I do believe that some flags would be considered differently by other moderators, and would have liked to know which moderator was the one declining my flag - and perhaps discuss the declination via email correspondence.
Since there is no declination reason (which would be nice, but since this system is used by SO which is a huge website I don't see this happening anytime soon.) is it possible to allow users with "enough" (Deputy badgers?) flag weight to see the responding moderator?
Much like the ability to see closing votes, deleted posts, and so on is acquired by reputation, these should be acquired by flag weight.
On a side note I would like to moan about how unfair it is that for someone with 620 flag weight a declined flag equals about ten helpful ones. It seems somewhat ungrateful...