"a spaceship crashed" shouldn't be a bunch of wreckage in a forest and plucky scavengers finding neat bits of technology to resell, it should be a "so the dominant species on that planet has been forever changed"

oh, to clarify, when I say "Chicxulubs of antimatter", I don't mean, like, the amount of antimatter is equivalent to the mass of the Chicxulub asteroid: I mean the amount of antimatter has energy approximately equal to the impact at Chicxulub that extincted the dinosaurs.

that's the thing with antimatter FTL starships: they're super dangerous in multiple ways, and that's an inherent part of how they work.

even ignoring them potentially being armed, even ignoring that they can go very fast (and what happens when they crash into something?), just the power they'd need to store to be able to do all that makes them weapons of mass destruction on a scale we can't even conceive of

like, every nuclear weapon on the planet is like 1.5 gigatons. A full on world war 3 is less than ONE TEN-THOUSANDTH as energetic as the fuel tanks of an enterprise