GMO free is anti-scientific. At least a ton of overlap between those who pursue it and also have a whole lot of other woo-woo food related eccentricities. A rounding error of people against it when you talk to them will bring up "big ag" monopolies/etc. which are legitimate concerns vs. various vague health concerns from eating it.

Organic I suppose is borderline. My parents were in this space as farmers, and the commercial scale operations putting the "certified organic" labels on mass produced food would be largely indistinguishable from the farm or large ag business next door. It devolved into a near-meaningless label to me seeing how it's been completely gamed to the point of being meaningless.

I put all this stuff - including the fad diets - somewhere on the "started from a kernel of truth and descended into crazy" spectrum.