I'd always been under the impression that you had to try and harm someone else to be making war, but apparently not any longer: hanging yourself with your blanket in a prison cell now counts as an act of war.
Update, 12/06/06: There's been a fair and entirely justified amount of oppobrium heaped on the US government's clearly morally bankrupt official line, but I think that the most thoughtful thing I have read about it is this, which, having discussed and endorsed the Kantian view that suicide, because it treats human life as an end not a means, is morally culpable, ends:
[The suicides'] personhood was already being used as mere means, by their jailers, and their suicides put an end to that abuse, as the abuse of slavery is ended when the slave dies attempting to escape. What we would say of the slave is, not that he lacks regard for human life, but that he shows precisely that regard which is appropriate to it. I would say the same of the Guantánamo suicides.