Now, when I ran Molten Core, back in the day, you needed that rep to get the Aqual Quintessence you needed to douse the runes. And you needed one Quintessence per rune, so several people in your raid had to be gathering rep with them in order to get enough to complete the raid! You kids today, you don't even need to march 40 people through Blackrock Depths to get them to the Raid entrance inside the very base of the dungeon! Now (well, soon) you just queue up in LFR and get all the sweet Hydraxian Waterlords reputation you want, and you don't even need it for anything!
I'll be over here in my rocking chair.