[Nuke]

anything capable of interstellar travel is also a weapon of mass destruction

[Mongoose]

While you are locally correct it would still be able to violate causality globally (like flying into the past and blowing itself up while still under construction). Even wormholes have this problem.

Hmm...I'll definitely have to try and hash this one out.  Lousy paradoxes.

[Mr. Vega]

Alcubierre drives have always been one of the more plausible potential FTL techniques, but I'm pretty sure this is going to run into the brick wall of causality protection by one mechanism or another.

e: honestly i have no idea if it will or not, it shouldn't violate local causality but?

Two words: consistency protection.

[General Battuta]

I can buy Novikov when I feel really really optimistic.