Laughs Uproariously You definitely need to properly calibrate your weapons, though I can't help but wonder if the target was deliberately chosen so that any extra "enthusiasm" would hurt Snape's territory? It's certainly the way I'd do it. I really think Fudge and Dumbles need to get off the dime and start negotiating in all seriousness while they've still got something to negotiate about; I don't think Harry nor his people are going to stand for the usual nonsense anymore.
The beam weaponry is bad enough, what'll they do if Harry decides to demonstrate what kind of projectile weaponry his ships pack (not necessarily "photon torpedoes", but hyper-velocity missiles, especially if they hit significant fractions of "C", could do considerably damage without warheads /per se/; with something along the lines of matter/antimatter or total conversion warheads, even a small one could make quite an impression.