AA being labeled "bad" is a complete result of conventional medicine/nutrition needing to have everything in black & white.
Recall that only recently did U.S. baby formula manufacturers start adding AA to formula because it is absolutely necessary for truly proper brain development
(another blow to veganism).
More to read on AA: http://www.bodybio.com/BodyBio/docs/...in-4to1Oil.pdf
This should not be interpreted as being pro-feedlot beef at all, however. Just putting AA in proper perspective.