Though military conscription was eliminated in these United States in 1973, one must still register to be drafted should it ever be reinstated. I suppose we should blockade Mexican ports should another Mexican-American War breakout as well?
It is not of my own free will that I give my name, rather I surrender it upon threat of imprisonment or fine. Americans are taught that slavery ended in the 1860's with the 13th Amendment to the Constitution, yet this chain cannot bind the beast that is an all-powerful government:
~13th Amendment to the Constitution
"Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction."
ADDENDUM: Note the wording of the above amendment, "... or any place subject to their jurisdiction." Interesting that even in 1865, "the United States" was still considered plural.