And regarding the potential particle weapon-esque accident potential, of the alcubierre drive, wouldn't, either this be negated by the fact that essentially the warp bubble moves, a finite portion of space, rather than the craft, and leaving a finite space in which to store particles..perhaps could be used to harvest energy, essentially using solar panels. And the fact that a planetary atmosphere, it would require a magnetosphere to be retained, the magnetic field would deflect charged particles, whereas uncharged, highly blue-shifted energy, that would be in the hard ultraviolet range, wouldn't it? and at least, if it would be the case of a 'deceleration blast' be blocked by the atmosphere? because extreme UV doesn't propagate well at all through the atmosphere.
And it would of course have to be tested in unmanned vehicles, and let loose in outer space, away from planetary systems which could possibly harbor life, and if such a phenomenon occurs, an unmanned probe could be fired ahead of the vehicle, with an instrument suite to examine the region outside the warp-bubble both during 'flight' of the vehicle and during shut-down. Examine the range, and determine how practical a pre-approach shut-down would be followed by conventional chemical and/or ion-drive approach systems. Ion drive being slow, but accelerating would allow for a shutdown of a warp-drive far before approach, already have the ion-drive running within the static region of space-time, to in effect catapult the craft, already run-up to speed with the ion drive within the warp-bubble, forwards giving it a heads-up on the whole slow ass acceleration of ion drive technology?
Assuming the idea about using a planetary magnetosphere/atmosphere to block any potential particle storm, would not compensate.
Might end up with us treating a few greys to a spectacular 'aurora xenos', I guess you might call it, though