Raiders don't HAVE to run it, the LFR is for people who can't do normals/Heroics for whatever reason. Be it time, lack of guild or lack of good skill. I don't feel people should be gate out of the LFR, if raiders are running it and burning them selves out its their problem no one elses. What WOULD be good is to add a feature that locks people out if they have heroic or normal raid gear on from DS. They obviously have no reason even being in the LFR to start with, and I have seen many people IN the LFR with full normal DS gear on rolling on items like they could use them.