They want to boycott the non-information that the "Non-GMO" label comes with. It's hugely deceptive at times, and applied to food where there's no GMO-equivelent.
The, IMHO, obvious fix is a mandatory "contains GMO" labeling. Which they obviously do not mention.
Well I think it is our right to know. Doctoring with DNA? At least let me know. Period.
[1] http://www.usatoday.com/story/news/politics/2016/06/23/senat...