As usual, I was being berated by an anonymous "GMO-free" account on Twitter, and also as usual, responded with kindness and tact.
It was the best response I could have imagined. It was the line I needed to drop engagement, block, mute, etc. When people do not accept evidence and instead trash others based on what they think, they don't deserve your time and attention. Trolls. Spend your time influencing others that are willing to learn, and at least consider evidence before making decisions.