If it makes you feel better, recently I saw a REAL waste of a limit break. I was in Brayflox normal. Healer used LB on second boss. We kindly informed him that healer LB1 is a waste and should be saved for the DPS to use. Last boss, he wastes the LB again.

The guy also didn't heal me (as tank) past 50% for the WHOLE dungeon. No comms for him.