I felt the same way when I was 18, and still feel the same way now, 20 years later. In the hypothetical situation of a war where they used the draft, I would have to agree to the need/motivation for the war. For example, I believe WWII was a justified war, I would have fought in WWII if I’d been around and of fighting age. Vietnam, no way, Iraq, no way, I think those were not justified wars. My way of thinking about war is it’s a failure of diplomacy and it should be used as a last ditch effort to protect our nation’s sovereignty.
So I went through that same thing, where I didn’t really want to register for the draft. But you know what, I did. I figured I didn’t want to lose eligibility for student financial aid, federal jobs…essentially anything the federal government can do for you, they won’t do it if you don’t register. And I decided that first off, there would have to be a war, second they would have to institute the draft, third it would have to happen within the next 8 years, fourth if all that happened my number would still have to be drawn, fifth if all THAT happened, I’d still have to pass the physical (which I personally being overweight with flat feet, never expected to be a problem), sixth, I was planning on college and there used to be a college deferment, seventh if ALL that failed I’d try to get conscientious objector status, eight if all THAT failed, they’d have to catch my ass in whatever country I fled to, and ninth, I’d do WHATEVER it took from hitting on the CO (which would have worked 20 years ago), to shooting myself in the foot, to sitting in a military prison….I refuse to die, or even risk my life for something in which I do not believe. I weighed the potential for this to be a bad decision against the potential for not registering to be a bad decision, and I arrived at the conclusion that registering was the way to go. And that was in Bush I’s America, and he DID start a war in which I didn’t believe, but conditions 2 through 9 never came into play.
And I could be wrong about this, but unless Obama screws up real bad, he’s going to be re-elected in 2012, which means he’ll be President until you’re almost 26, which is the highest age for drafts, and I seriously doubt Obama would re-institute the draft unless our Democracy depended on it, and if that were the case, you should WANT to go. So if I were you, I’d register, say it sucks that I have to, but then don’t worry about it, it’s highly unlikely to ever come up, and if it does, deal with it as you see appropriate.