>Were there lots of live releases that borrowed crowd sounds from Woodstock or
>other famous events?

I know of a few from the 60's - Some sleesy record companies sometimes
mixed in
canned appause with studio tracks create a phony live album to fool fans into
buying the same music again.  A collector friend used to have a Duane Eddy
record on Jamie records that was done this way. And I have an 60's Ventures
album called "On Stage" where the cover mentions it was recorded live in Japan
and the USA. The whole album sounds like it was recorded in the same studio
with an annoying tape loop of appause and whistles repeated over and over
again. 

I heard rumors that Eddie Kramer mixed in sound effects from NFL football
crouds on Kiss "Alive!" and later "Frampton Comes Alive" to create the effect
of these then little known acts playing for thousands of fans instead of a few
hundred or less. 

Billy