Justifiable (and artistic, and scientific) cruelty to animals
The comments page has a flamefest about the morality of killing hundreds or thousands of ants in the name of Art. Which side one takes in the argument seems to depend largely on whether one has ever met a fire-ant. I have, and I'm fine with it :-)
Thanks to Phlip for the link.

no subject
Possible, but unlikely.
Perhaps they'll run off, find another colony, and introduce themselves by saying "Call me Ishmael..."