Hmm, good point.

Speaking of antimatter... How would you actually make an industry out of that? Y'know, how would you collect it and put it in your spaceships to do stuff? And, how exactly would it work as an engine or weapon system?

On antimatter missiles and whatnot, wouldn't it be silly to make the actual explosive antimatter? Once you get to 90% light speed or so, like an antimatter rocket could do in theory, an explosive, even an antimatter explosive, would be redundant. After-all, you are going at a damn good fraction of the speed of light. That's a huge amount of kinetic energy, is it not? It obviously depends on the size and weight of the antimatter propelled missile, but my point still stands.