[quote=Zamiel]
I wonder. It would be incredibly interesting to play a faction towards whom nobody holds back, to the full extent of physics. "lol my asteroids with drives just appeared a few meters above all your planets."
[/quote]

Maybe that will be my next strategy

I'll take asteroids, get drilling machines to drill 6 paths deep into the very center of it, build an FTL drive, and then activate it to appear well within the gravity well of a planet. The only way to stop it would be to either
 A) blast it with anti-asteroid weapons, which I doubt will be ready to fire before it impacts 
 B) deploy soldiers to fall down into the holes into the center to deactivate or FTL elsewhere. Nevermind, that wouldn't work, it'd just disintegrate in atmo and instead shower the planet with a rain of rocks.