I can sympathise with the Dragoons who are trying to eat and dungeon run at the same time, keeping BotD up one handed is hard to almost impossible if you're a console/gamepad player like me.
But if you're just "Bah it's only a trash mob, Phfff It's only a DUNGEON Boss, and I haz raidz gear, respect me peons!!" then they give all Dragoons bad names. BotD is the key to our post 60 damage out put, if you can pull it off you always should. There's no excuse for not going all out, ESPECIALLY if you're a high level raider. If I had the full i200 Alexander gear, I don't care if I'm fighting a lvl 1 dormouse, I'd be going all out as a player of that level should. I don't claim to be perfect, after the 20th dungeon of the day I get combat tired and sloppy too. But Lazy is Lazy. And if I'm not mistaken threatening to report someone is against the ToS Agreement as well under the Anti-Harassment clause.