Maybe not just miniature black holes. I'm trying to work out what would happen to the light emitted towards the front of the Alcubierre bubble from the inside, and there's a possibility it'd get stuck there for the entire duration of FTL flight. Those are mere doodles as far as GR maths goes, but maybe you could end up with a kugelblitz in front of your ship after—or during!—a long enough flight.
Imagine pointing your starship at your friend's star system, pressing "go", and then accidentally enveloping them inside a black hole when you decelerated upon arrival. Bummer. I'd never heard of kugelblitz! That was great. I've thought about the absurd amount of exclusively bosonic energy density that would be required to make a space-time singularity, but I didn't know there was a name for it :).
I thought you wrote grant proposals. Remove 'accidentally', change 'friend' to 'enemy' and get yourself some of that DoD/DoE money.Imagine pointing your starship at your friend's star system, pressing "go", and then accidentally enveloping them inside a black hole when you decelerated upon arrival. Bummer.
Hhahahaha, this was fantastic! My branch of funding now only selects less than ~10% of proposals, and it's getting worse, so I really appreciate you throwin' me a bone here, bruh. :)