not wanting to fan flames, but try this:
http://www.amazon.com/Homecoming-Bob-Greene/dp/0399133860 . There are over 1000 discrete instances of spitting or other abuse of returning vets referenced there.
FWIW, it's also a matter of record that returning vets were advised not to wear their uniforms off-base because of spitting and other targeting. Why? (I suppose I'm setting myself up to have spitting compared to WMD in Iraq or similar, but it seems unlikely that the military would have made it up in 1970. Where would be the benefit?)
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
